name stringlengths 9 112 | description stringlengths 29 13k | solutions stringlengths 24 49.8k |
|---|---|---|
1245_B. Restricted RPS | Let n be a positive integer. Let a, b, c be nonnegative integers such that a + b + c = n.
Alice and Bob are gonna play rock-paper-scissors n times. Alice knows the sequences of hands that Bob will play. However, Alice has to play rock a times, paper b times, and scissors c times.
Alice wins if she beats Bob in at lea... | ```python
from math import ceil
t = int(input())
slow = {"S": "R", "R": "P", "P": "S"}
for _ in range(t):
n = int(input())
a, b, c = map(int, input().split())
s = input()
slow2 = {"S": a, "R": b, "P": c}
res = 0
ans = [''] * n
for i in range(n):
if slow2[s[i]] > 0:
res ... |
1264_F. Beautiful Fibonacci Problem | The well-known Fibonacci sequence F_0, F_1, F_2,… is defined as follows:
* F_0 = 0, F_1 = 1.
* For each i ≥ 2: F_i = F_{i - 1} + F_{i - 2}.
Given an increasing arithmetic sequence of positive integers with n elements: (a, a + d, a + 2⋅ d,…, a + (n - 1)⋅ d).
You need to find another increasing arithmetic se... | ```python
o,m,k=map(int,input().split())
print(368131125*m%10**9*12*10**9+1,368131125*k%10**9*12*10**9)
``` |
1286_C1. Madhouse (Easy version) | This problem is different with hard version only by constraints on total answers length
It is an interactive problem
Venya joined a tour to the madhouse, in which orderlies play with patients the following game. Orderlies pick a string s of length n, consisting only of lowercase English letters. The player can ask tw... | ```python
from bisect import bisect_left as bl
from bisect import bisect_right as br
import heapq
import math
from collections import *
from functools import reduce,cmp_to_key
import sys
input = sys.stdin.readline
# M = mod = 998244353
def factors(n):return sorted(list(set(reduce(list.__add__,([i, n//i] for i in rang... |
132_A. Turing Tape | INTERCAL is the oldest of esoteric programming languages. One of its many weird features is the method of character-based output, known as Turing Tape method. It converts an array of unsigned 8-bit integers into a sequence of characters to print, using the following method.
The integers of the array are processed one ... | ```python
ans=0
for i in input():
t=bin(ord(i))[2::][::-1]
k=int(t+"0"*(8-len(t)),2)
print((ans-k)%256)
ans=k
``` |
136_D. Rectangle and Square | Little Petya very much likes rectangles and especially squares. Recently he has received 8 points on the plane as a gift from his mother. The points are pairwise distinct. Petya decided to split them into two sets each containing 4 points so that the points from the first set lay at the vertexes of some square and the ... | ```python
import itertools
import math
import os
import sys
eps = 1e-8
coord = [[]] + [list(map(int, input().split())) for _ in range(8)]
idx = list(range(1, 9))
def perpendicular(v1, v2):
return sum([x * y for (x, y) in zip(v1, v2)]) < eps
def all_perpendicular(vs):
return all([perpendicular(vs[i], vs[(i+... |
1392_D. Omkar and Bed Wars | Omkar is playing his favorite pixelated video game, Bed Wars! In Bed Wars, there are n players arranged in a circle, so that for all j such that 2 ≤ j ≤ n, player j - 1 is to the left of the player j, and player j is to the right of player j - 1. Additionally, player n is to the left of player 1, and player 1 is to the... | ```python
def find_cost_of_reordering(directions):
assert len(directions) >= 3
directions_n = len(directions)
get_direction = lambda index: directions[index % directions_n]
if len(set(directions)) == 1:
return 1 + (directions_n - 1) // 3
i = 0
while get_direction(i) == get... |
1433_E. Two Round Dances | One day, n people (n is an even number) met on a plaza and made two round dances, each round dance consists of exactly n/2 people. Your task is to find the number of ways n people can make two round dances if each round dance consists of exactly n/2 people. Each person should belong to exactly one of these two round da... | ```python
def fact(n):
ft=1
while n>0:
ft=ft*n
n=n-1
return ft
n=int(input())
q=2*fact(n)//(n*n)
print(q)
``` |
1458_D. Flip and Reverse | You are given a string s of 0's and 1's. You are allowed to perform the following operation:
* choose a non-empty contiguous substring of s that contains an equal number of 0's and 1's;
* flip all characters in the substring, that is, replace all 0's with 1's, and vice versa;
* reverse the substring.
For exa... | ```python
# test Arpa code
import io,os, sys
input = sys.stdin.readline
print = sys.stdout.write
t = int(input())
START = 500001
seen = [0] * (2 * START)
while t > 0:
t -= 1
s = input().strip("\n")
cur = START
for c in s:
if c == '0':
seen[cur] += 1
cur -= 1
els... |
1481_D. AB Graph | Your friend Salem is Warawreh's brother and only loves math and geometry problems. He has solved plenty of such problems, but according to Warawreh, in order to graduate from university he has to solve more graph problems. Since Salem is not good with graphs he asked your help with the following problem.
<image>
You ... | ```python
import sys
input=sys.stdin.readline
for t in range(int(input())):
N,M=map(int,input().split())
S=[input() for i in range(N)]
F=0
for i in range(N):
for j in range(N):
if i!=j and S[i][j]==S[j][i]:
F=1
P=[i+1]
for k in range(M):
if k&1:
P.append... |
1534_F1. Falling Sand (Easy Version) | This is the easy version of the problem. The difference between the versions is the constraints on a_i. You can make hacks only if all versions of the problem are solved.
Little Dormi has recently received a puzzle from his friend and needs your help to solve it.
The puzzle consists of an upright board with n rows a... | ```python
import sys
input = lambda: sys.stdin.readline().rstrip()
def scc(E):
n = len(E)
iE = [[] for _ in range(n)]
for i, e in enumerate(E):
for v in e:
iE[v].append(i)
T = []
done = [0] * n # 0 -> 1 -> 2
ct = 0
for i0 in range(n):
if done[i0]: continue
... |
181_D. Word Cut | Let's consider one interesting word game. In this game you should transform one word into another through special operations.
Let's say we have word w, let's split this word into two non-empty parts x and y so, that w = xy. A split operation is transforming word w = xy into word u = yx. For example, a split operation... | ```python
MOD = int(1e9) + 7
if __name__ == "__main__":
a = input()
b = input()
k = int(input())
if(len(a) != len(b)):
print(0)
exit()
a = a + a
x = 0
y = 0
for i in range(len(a) // 2):
flag = 1
for j in range(len(b)):
if(a[j + i] != b[j]):
... |
205_A. Little Elephant and Rozdil | The Little Elephant loves Ukraine very much. Most of all he loves town Rozdol (ukr. "Rozdil").
However, Rozdil is dangerous to settle, so the Little Elephant wants to go to some other town. The Little Elephant doesn't like to spend much time on travelling, so for his journey he will choose a town that needs minimum ti... | ```python
n = int(input())
string = input()
times = list(map(int, string.split()))
a = min(times)
if times.count(a) == 1:
print(times.index(a) + 1)
else:
print("Still Rozdil")
``` |
278_D. Set of Points | Convexity of a set of points on the plane is the size of the largest subset of points that form a convex polygon. Your task is to build a set of n points with the convexity of exactly m. Your set of points should not contain three points that lie on a straight line.
Input
The single line contains two integers n and m... | ```python
def f(x):
return int(x * x + 1e7)
def g(x):
return -f(x)
n, m = map(int, input().split())
if(m == 3):
if(n == 3):
print('0 0')
print('1 0')
print('0 1')
elif(n == 4):
print('0 0')
print('1 1')
print('10000 0')
print('0 10000')
... |
300_C. Beautiful Numbers | Vitaly is a very weird man. He's got two favorite digits a and b. Vitaly calls a positive integer good, if the decimal representation of this integer only contains digits a and b. Vitaly calls a good number excellent, if the sum of its digits is a good number.
For example, let's say that Vitaly's favourite digits are ... | ```python
MOD=10**9+7
a,b,n=list(map(int,input().strip().split(' ')))
#there are i a's. n-i b's
def check(a,b,x):
temp=x%10
if temp!=a and temp!=b:
return 0
while(x>0):
temp=x%10
if temp!=a and temp!=b:
return 0
x=x//10
return 1
fact=[1]
infact=[1]
temp=... |
327_A. Flipping Game | Iahub got bored, so he invented a game to be played on paper.
He writes n integers a1, a2, ..., an. Each of those integers can be either 0 or 1. He's allowed to do exactly one move: he chooses two indices i and j (1 ≤ i ≤ j ≤ n) and flips all values ak for which their positions are in range [i, j] (that is i ≤ k ≤ j)... | ```python
n=int(input())
a = list(map(int, input().split()))
mas=[0]*n
if a[0]==0:
mas[0]=1
else:
mas[0]=-1
m=mas[0]
for i in range(1,n):
mas[i]=max( mas[i-1] + (-1)**a[i], (-1)**a[i])
m=max(m,mas[i])
print(a.count(1)+m)
``` |
349_B. Color the Fence | Igor has fallen in love with Tanya. Now Igor wants to show his feelings and write a number on the fence opposite to Tanya's house. Igor thinks that the larger the number is, the more chance to win Tanya's heart he has.
Unfortunately, Igor could only get v liters of paint. He did the math and concluded that digit d re... | ```python
v = int(input())
a = [*map(int, input().split())]
d = {}
for i in range(9):
d[a[i]] = i + 1
ans = [*str(d[min(a)]) * (v // min(a))]
t = min(a) * len(ans)
for i in range(len(ans)):
t -= a[int(ans[i]) - 1]
for j in range(8, -1, -1):
if t + a[j] <= v:
ans[i] = str(j + 1)
t += a[j]
break
print('... |
372_C. Watching Fireworks is Fun | A festival will be held in a town's main street. There are n sections in the main street. The sections are numbered 1 through n from left to right. The distance between each adjacent sections is 1.
In the festival m fireworks will be launched. The i-th (1 ≤ i ≤ m) launching is on time ti at section ai. If you are at s... | ```python
from collections import deque
n,m,v=map(int,input().split())
x,t,b,bt,dp,mi,mi2,mi3,dpmin,dp2=[0]*300,[0]*300,0,0,[[0]*2for i in range(150001)],0,100000000000000,10000000000000,0,[0]*150001
d=deque()
for i in range(m):
x[i],b,t[i]=map(int,input().split())
bt+=b
for i2 in range(m-1):
if i2==0:
... |
417_A. Elimination | The finalists of the "Russian Code Cup" competition in 2214 will be the participants who win in one of the elimination rounds.
The elimination rounds are divided into main and additional. Each of the main elimination rounds consists of c problems, the winners of the round are the first n people in the rating list. Eac... | ```python
import math
c,d = map(int,input().split())
n,m = map(int,input().split())
k=int(input())
if k>=n*m:
print('0')
else:
left=n*m-k
t=c*(math.ceil(left/n))
j= c*(left//n) + (left%n)*d
l=d*(left)
print(min(t,j,l))
``` |
443_D. Andrey and Problem | Andrey needs one more problem to conduct a programming contest. He has n friends who are always willing to help. He can ask some of them to come up with a contest problem. Andrey knows one value for each of his fiends — the probability that this friend will come up with a problem if Andrey asks him.
Help Andrey choose... | ```python
n = input()
ans = tmp = 0.0
prod = 1.0
for p in reversed(sorted(map(float, input().split()))):
tmp = tmp * (1.0 - p) + prod * p
prod *= 1.0 - p
ans = max(ans, tmp)
print('%0.9f' % ans)
``` |
489_D. Unbearable Controversy of Being | Tomash keeps wandering off and getting lost while he is walking along the streets of Berland. It's no surprise! In his home town, for any pair of intersections there is exactly one way to walk from one intersection to the other one. The capital of Berland is very different!
Tomash has noticed that even simple cases of... | ```python
import sys
from collections import defaultdict, Counter
# sys.stdin = open('input.txt', 'r')
# sys.stdout = open('output.txt', 'w')
input = sys.stdin.readline
n, m = map(int, input().split())
g = defaultdict(list)
for _ in range(m):
a, b = map(int, input().split())
g[a-1].append(b-1)
# print(g)
rh... |
513_B2. Permutations | You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having the maximum possible value of f(p).
Input
The single line of input contains two integers n and m (1 ≤ m ≤ cntn), where cntn... | ```python
n, m = map(int, input().split())
s = 1
c = n - 1
arr = [0] * n
i = 0
while i <= c:
r = 0
j = s
while j <= n and r < m:
if j < n:
r += 2 ** (n - j - 1)
j += 1
#print(s, j, r, m)
if j > s and j != n + 1:
r -= 2 ** (n - j)
m -= r
j -= 1
arr[i] =... |
538_D. Weird Chess | Igor has been into chess for a long time and now he is sick of the game by the ordinary rules. He is going to think of new rules of the game and become world famous.
Igor's chessboard is a square of size n × n cells. Igor decided that simple rules guarantee success, that's why his game will have only one type of piece... | ```python
import sys
fin = sys.stdin
n = int(fin.readline())
ma = [[None]] * n
for i in range(0, n):
aux = fin.readline()
aux = aux[:-1]
ma[i] = list(aux)
r = []
for i in range(0, 2 * n - 1):
r.append(None)
r[i] = []
for j in range(0, 2 * n - 1):
r[i].append('x')
for i in range(0, n):
... |
60_B. Serial Time! | The Cereal Guy's friend Serial Guy likes to watch soap operas. An episode is about to start, and he hasn't washed his plate yet. But he decided to at least put in under the tap to be filled with water. The plate can be represented by a parallelepiped k × n × m, that is, it has k layers (the first layer is the upper one... | ```python
from collections import deque
class CodeforcesTask60BSolution:
def __init__(self):
self.result = ''
self.k_n_m = []
self.plate = []
self.tape = []
def read_input(self):
self.k_n_m = [int(x) for x in input().split(" ")]
for x in range(self.k_n_m[0]):
... |
630_G. Challenge Pennants | Because of budget cuts one IT company established new non-financial reward system instead of bonuses.
Two kinds of actions are rewarded: fixing critical bugs and suggesting new interesting features. A man who fixed a critical bug gets "I fixed a critical bug" pennant on his table. A man who suggested a new interesting... | ```python
from functools import reduce
def c(n, m):
return 0 if n>m or n<0 else reduce(lambda a,b: a*b, range(m-n+1, m+1), 1)//reduce(lambda a,b: a*b, range(1,n+1), 1)
n = int(input())
print(sum([c(i, n)*c(i-1, 2) for i in range(1, 4)])*sum([c(i, n)*c(i-1, 4) for i in range(1, 6)]))
``` |
658_D. Bear and Polynomials | Limak is a little polar bear. He doesn't have many toys and thus he often plays with polynomials.
He considers a polynomial valid if its degree is n and its coefficients are integers not exceeding k by the absolute value. More formally:
Let a0, a1, ..., an denote the coefficients, so <image>. Then, a polynomial P(x) ... | ```python
def convert_to_binary(coef):
res = []
n = len(coef)
carry = 0
i = 0
while i < n + 1000:
if i >= n and not carry:
break
cur = carry
if i < n:
cur += coef[i]
mod = cur % 2
div = cur // 2
# print(cur, div, mod)
r... |
681_A. A Good Contest | Codeforces user' handle color depends on his rating — it is red if his rating is greater or equal to 2400; it is orange if his rating is less than 2400 but greater or equal to 2200, etc. Each time participant takes part in a rated contest, his rating is changed depending on his performance.
Anton wants the color of hi... | ```python
#!/usr/bin/env python3
if __name__ == '__main__':
n = int(input())
for _ in range(n):
handle, prev, curr = input().split()
prev = int(prev)
curr = int(curr)
if prev < 2400:
continue
if curr > prev:
print('YES')
break
el... |
747_E. Comments | A rare article in the Internet is posted without a possibility to comment it. On a Polycarp's website each article has comments feed.
Each comment on Polycarp's website is a non-empty string consisting of uppercase and lowercase letters of English alphabet. Comments have tree-like structure, that means each comment ex... | ```python
from queue import Queue
def parse(s):
A = s.split(',')
n = len(A)//2
B = [(A[2*i], int(A[2*i+1])) for i in range(n)]
stack = []
E = {i:[] for i in range(n+1)}
comment = {}
depth = {i:0 for i in range(n+1)}
for i, b in enumerate(reversed(B)):
comment[i+1] = b[0]
... |
770_B. Maximize Sum of Digits | Anton has the integer x. He is interested what positive integer, which doesn't exceed x, has the maximum sum of digits.
Your task is to help Anton and to find the integer that interests him. If there are several such integers, determine the biggest of them.
Input
The first line contains the positive integer x (1 ≤ ... | ```python
num = list(input())
orgnum = num.copy()
if len(num) == 1:
print(num[0])
elif num[1:] != list("9"*(len(num)-1)):
if num[1:] == list("8"+"9"*(len(num)-2)):
print(int("".join(num)))
elif "9" in num:
finished = False
did = False
for i in range(len(num)):
if ... |
794_E. Choosing Carrot | Oleg the bank client and Igor the analyst are arguing again. This time, they want to pick a gift as a present for their friend, ZS the coder. After a long thought, they decided that their friend loves to eat carrots the most and thus they want to pick the best carrot as their present.
There are n carrots arranged in a... | ```python
def evens(A):
n = len(A)
l = n//2-1; r = n//2
if len(A)%2 == 1: l+= 1
ans = [max(A[l], A[r])]
while r < n-1:
l-= 1; r+= 1
ans.append(max(ans[-1], A[l], A[r]))
return ans
def interleave(A, B):
q = []
for i in range(len(B)): q+= [A[i], B[i]]
if len(A) != len(... |
887_D. Ratings and Reality Shows | There are two main kinds of events in the life of top-model: fashion shows and photo shoots. Participating in any of these events affects the rating of appropriate top-model. After each photo shoot model's rating increases by a and after each fashion show decreases by b (designers do too many experiments nowadays). Mor... | ```python
from sys import stdin
from collections import deque
def main():
n, a, b, c, d, st, l = map(int, input().split())
q = deque()
po = q.popleft
pu = q.append
mq = deque()
mpop = mq.pop
mpo = mq.popleft
mpu = mq.append
sb = [0] * (n + 1)
mst = st
pu((0, 0, mst, st))
... |
90_D. Widget Library | Vasya writes his own library for building graphical user interface. Vasya called his creation VTK (VasyaToolKit). One of the interesting aspects of this library is that widgets are packed in each other.
A widget is some element of graphical interface. Each widget has width and height, and occupies some rectangle on t... | ```python
import sys
from array import array # noqa: F401
import re
def input():
return sys.stdin.buffer.readline().decode('utf-8')
class Widget(object):
def __init__(self, x, y):
self.x = x
self.y = y
class Box(object):
def __init__(self):
self.children = []
self.bord... |
932_A. Palindromic Supersequence | You are given a string A. Find a string B, where B is a palindrome and A is a subsequence of B.
A subsequence of a string is a string that can be derived from it by deleting some (not necessarily consecutive) characters without changing the order of the remaining characters. For example, "cotst" is a subsequence of "c... | ```python
# -*- coding: utf-8 -*-
"""
Created on Thu Feb 15 21:01:05 2018
@author: DNARNAprotein
"""
"""
CODEFORCES
http://codeforces.com/contest/932/problem/A
"""
def pikachu(a,c,n): #c is original string
prefixes=[a[0:i+1] for i in range(n+1)]
suffixes=[a[i:n+1] for i in range(n+1)]
maxi=0
for i in... |
959_B. Mahmoud and Ehab and the message | Mahmoud wants to send a message to his friend Ehab. Their language consists of n words numbered from 1 to n. Some words have the same meaning so there are k groups of words such that all the words in some group have the same meaning.
Mahmoud knows that the i-th word can be sent with cost ai. For each word in his messa... | ```python
a = list(map(int,input().split(" ")))
n,k,m = a[0],a[1],a[2]
words = list(input().split(" "))
cost = list(map(int,input().split(" ")))
dic = {}
for i in range(k):
tmp = list(map(int,input().split(" ")))
if tmp[0] == 1:
dic[words[tmp[1]-1]] = cost[tmp[1]-1]
else:
mincost = min(cost[... |
p02580 AtCoder Beginner Contest 176 - Bomber | We have a two-dimensional grid with H \times W squares. There are M targets to destroy in this grid - the position of the i-th target is \left(h_i, w_i \right).
Takahashi will choose one square in this grid, place a bomb there, and ignite it. The bomb will destroy all targets that are in the row or the column where th... | ```python
H, W, M = map(int, input().split())
bombs_h = [0] * H
bombs_w = [0] * W
B = []
for _ in range(M):
h, w = map(lambda x: int(x)-1, input().split())
B.append((h, w))
bombs_h[h] += 1
bombs_w[w] += 1
max_h = max(bombs_h)
max_w = max(bombs_w)
hs = [i for i, x in enumerate(bombs_h) if x == max_h]
ws... |
p02711 AtCoder Beginner Contest 162 - Lucky 7 | Given is a three-digit integer N. Does N contain the digit 7?
If so, print `Yes`; otherwise, print `No`.
Constraints
* 100 \leq N \leq 999
Input
Input is given from Standard Input in the following format:
N
Output
If N contains the digit 7, print `Yes`; otherwise, print `No`.
Examples
Input
117
Output
Y... | ```python
print(['No', 'Yes']['7' in input()])
``` |
p02840 AtCoder Beginner Contest 147 - Sum Difference | We have an integer sequence A of length N, where A_1 = X, A_{i+1} = A_i + D (1 \leq i < N ) holds.
Takahashi will take some (possibly all or none) of the elements in this sequence, and Aoki will take all of the others.
Let S and T be the sum of the numbers taken by Takahashi and Aoki, respectively. How many possible ... | ```python
N,X,D=map(int,input().split())
from collections import defaultdict
A=defaultdict(list)
A[0].append([0,0])
MIN=0
MAX=0
if D==0:
w=1
else:
w=D
for i in range(N):
MIN+=X+D*i
MAX+=X+D*(N-1-i)
A[MIN%w].append(sorted([MIN,MAX]))
D=abs(D)
if D==0:
if X==0:
D=1
else:
... |
p02977 AtCoder Grand Contest 035 - Skolem XOR Tree | You are given an integer N. Determine if there exists a tree with 2N vertices numbered 1 to 2N satisfying the following condition, and show one such tree if the answer is yes.
* Assume that, for each integer i between 1 and N (inclusive), Vertex i and N+i have the weight i. Then, for each integer i between 1 and N, th... | ```python
"""
https://atcoder.jp/contests/agc035/tasks/agc035_c
全ての対の頂点に関して、パス上の重みのxorが自分に等しい
1から順に求めていくことを考える
A,Bの関係を考える
木なので、片方のパス上にあればいい→片方にのみ含ませることも、両方に含ませることも可能
1をいい感じに使って構築できないか？
101-100-1-101-100
みたいに、1の位だけ違う数字をまとめて処理すればいい感じになる
もう一つの1は、どっかの葉につけておけばおk
これで、Nが奇数かつ1でない場合は全て構築可能！！
偶数の時は？ 2,4みたいな場合は自明にダメ
6は？
00... |
p03260 AtCoder Beginner Contest 109 - ABC333 | You are given integers A and B, each between 1 and 3 (inclusive).
Determine if there is an integer C between 1 and 3 (inclusive) such that A \times B \times C is an odd number.
Constraints
* All values in input are integers.
* 1 \leq A, B \leq 3
Input
Input is given from Standard Input in the following format:
A... | ```python
print("Yes" if all(int(i) % 2 != 0 for i in input().split()) else "No")
``` |
p03416 AtCoder Beginner Contest 090 - Palindromic Numbers | Find the number of palindromic numbers among the integers between A and B (inclusive). Here, a palindromic number is a positive integer whose string representation in base 10 (without leading zeros) reads the same forward and backward.
Constraints
* 10000 \leq A \leq B \leq 99999
* All input values are integers.
Inp... | ```python
a,b=map(int,input().split())
ans=0
for i in range(a,b+1):
ir=str(i)
if ir == ir[::-1]:
ans+=1
print(ans)
``` |
p03576 AtCoder Beginner Contest 075 - Axis-Parallel Rectangle | We have N points in a two-dimensional plane.
The coordinates of the i-th point (1 \leq i \leq N) are (x_i,y_i).
Let us consider a rectangle whose sides are parallel to the coordinate axes that contains K or more of the N points in its interior.
Here, points on the sides of the rectangle are considered to be in the inte... | ```python
N, K = map(int, input().split())
X, Y = [], []
D = []
for i in range(N):
x, y = map(int, input().split())
X.append(x)
Y.append(y)
D.append((x, y))
X = sorted(X)
Y = sorted(Y)
num = float("inf")
for i in range(N - 1):
for j in range(i + 1, N):
for k in range(N - 1):
for... |
p03733 AtCoder Regular Contest 073 - Sentou | In a public bath, there is a shower which emits water for T seconds when the switch is pushed.
If the switch is pushed when the shower is already emitting water, from that moment it will be emitting water for T seconds. Note that it does not mean that the shower emits water for T additional seconds.
N people will pus... | ```python
from operator import sub
n, t = map(int, input().split())
res = t
temp = list(map(int, input().split()))
for v in map(sub, temp[1:], temp):
res += min(t, v)
print(res)
``` |
p03895 CODE FESTIVAL 2016 Relay (Parallel) - Early Bird | Takahashi recorded his daily life for the last few days as a integer sequence of length 2N, as follows:
* a_1, b_1, a_2, b_2, ... , a_N, b_N
This means that, starting from a certain time T, he was:
* sleeping for exactly a_1 seconds
* then awake for exactly b_1 seconds
* then sleeping for exactly a_2 seconds
* :
*... | ```python
n = int(input())
x,num = [],0
for i in range(n):
a,b = (int(j) for j in input().split())
x.append((num+a)%86400)
num = (num+a+b)%86400
x,ans = sorted(x),0
from bisect import bisect
for i in range(n):
ans = max(ans,bisect(x,x[i]+10800)-i)
if x[i]<=10800: x.append(x[i]+86400)
print(ans)
``` |
p00001 List of Top 3 Hills | There is a data which provides heights (in meter) of mountains. The data is only for ten mountains.
Write a program which prints heights of the top three mountains in descending order.
Constraints
0 ≤ height of mountain (integer) ≤ 10,000
Input
Height of mountain 1
Height of mountain 2
Height of mountain 3
.
.
He... | ```python
h = [int(input()) for i in range(10)]
h.sort(reverse = True)
for i in range(3):
print(h[i])
``` |
p00133 Rotation of a Pattern | Create a program that rotates the pattern of 8 characters x 8 lines clockwise by 90 degrees, 180 degrees, and 270 degrees and outputs it.
Input
A pattern consisting of 8 characters x 8 lines is given. Characters consist of alphanumeric characters, half-width pound'#', and asterisk'*'.
Output
Output the rotated pa... | ```python
# AOJ 0133 Rotation of a Pattern
# Python3 2018.6.19 bal4u
a = [[[0 for c in range(8)] for r in range(8)] for k in range(4)]
title = ["0", "90", "180", "270"]
for r in range(8):
a[0][r] = list(input())
for k in range(1, 4):
print(title[k])
for r in range(8):
for c in range(8):
a[k][c][7-r] = a[k-1][... |
p00266 Izua Dictionary | You have obtained the Izua Japanese dictionary, which is the official language of Izua, and the Izua alphabet (list of letters). There are N types of letters in the Izua alphabet. The order of the words that appear in the Izua Japanese dictionary is in the alphabetical order of Izua.
Looking at the dictionary, I found... | ```python
def solve():
from sys import stdin
m = 1000000007
f_i = stdin
while True:
N = int(f_i.readline())
if N == 0:
break
w = list(range(N))
R = int(f_i.readline())
for i in range(R):
s, t = map(int, f_i.readline().split())... |
p00453 Pyon-Pyon River Crossing | problem
In one river, there is a slightly dangerous game of jumping from one shore to the other on a stone.
<image>
Now, as shown in Figure 4-1 we consider the stone to be above the squares. The number of rows is n. In Figure 4-1 we have n = 5.
In this game, you start with one shore and make a normal jump or a on... | ```python
from heapq import heappop, heappush
while True:
n, m = map(int, input().split())
if not n:
break
num_stones = 0
row_stones = [None] * n
edges = [None] * n
visited = [None] * n
for row in range(n):
(num, *stones) = map(int, input().split())
row_stones[row] ... |
p00644 Winter Bells | The best night ever in the world has come! It's 8 p.m. of December 24th, yes, the night of Cristmas Eve. Santa Clause comes to a silent city with ringing bells. Overtaking north wind, from a sleigh a reindeer pulls she shoot presents to soxes hanged near windows for children.
The sleigh she is on departs from a big ch... | ```python
from heapq import heappush, heappop
INF = 10 ** 20
while True:
n, m, p = map(int, input().split())
if n == 0:
break
edges = [[] for _ in range(n)]
for _ in range(m):
x, y, w = map(int, input().split())
edges[x].append((y, w))
edges[y].append((x, w))
que = []
heappush(que, (0, 0))
... |
p00788 Rational Irrationals | Rational numbers are numbers represented by ratios of two integers. For a prime number p, one of the elementary theorems in the number theory is that there is no rational number equal to √p. Such numbers are called irrational numbers. It is also known that there are rational numbers arbitrarily close to √p
Now, given ... | ```python
import sys
readline = sys.stdin.readline
write = sys.stdout.write
def stern_brocot(p, n):
la = 0; lb = 1
ra = 1; rb = 0
lu = ru = 1
lx = 0; ly = 1
rx = 1; ry = 0
while lu or ru:
ma = la + ra; mb = lb + rb
if p * mb**2 < ma**2:
ra = ma; rb = mb
i... |
p01322 Lottery Checker | You have successfully completed your studies and are preparing to move from near Komaba to near Hongo. As I was organizing my house, I found a lot of lottery tickets I bought last year. After confirming the exchange deadline, I have to cash in by tomorrow, but it is troublesome to go to the lottery counter for a small ... | ```python
import re
while 1:
n,m=map(int,input().split())
if n==0:break
p=[];s=0
for _ in [0]*n:
n,M=input().replace('*','[0-9]').split()
p.append([re.compile(n),int(M)])
for _ in [0]*m:
l=input()
for n,M in p:
if n.search(l):
s+=M;break
... |
p01490 HullMarathon | Example
Input
4
5
8
58
85
Output
2970.000000000 | ```python
from itertools import permutations
from math import acos, sin, cos, pi
import sys
readline = sys.stdin.readline
write = sys.stdout.write
def solve():
N = int(readline())
R = [int(readline()) for i in range(N)]
R.sort(reverse=1)
ans = 0
for l in range(3, N+1):
for rs in permutation... |
p01803 Airport Codes | Airport Codes
Airport code
In the Kingdom of JAG, airport codes are assigned to each domestic airport for identification.
Airport codes are assigned according to the following rules based on the name of the airport in lowercase English alphabet:
1. Extract the first letter of the name and the letter immediately aft... | ```python
while 1:
n=int(input())
if not n:break
l=[]
m=0
for _ in range(n):
s=input()
a=s[0]
for i,t in enumerate(s[:-1]):
if any(t==c for c in'aiueo'):
a+=s[i+1]
m=max(m,len(a))
l.append(a)
for k in range(m+1):
if len(... |
p01938 A-Z- | A: A-Z-
problem
There is a circular board of 26 squares, each square with one capital letter of the alphabet written clockwise in alphabetical order. That is, the clockwise side of the'A'square is the'B' square, the next side of the'B'square is the'C'square, and ..., the clockwise side of the'Z'square is the'A'. It's... | ```python
S = input()
cur = 'A'
ans = 0
for i in range(len(S)):
if(S[i] == cur):
ans += 1
else:
if(cur > S[i]):
ans += 1
cur = S[i]
print(ans)
``` |
p02371 Diameter of a Tree | Diameter of a Tree
Given a tree T with non-negative weight, find the diameter of the tree.
The diameter of a tree is the maximum distance between two nodes in a tree.
Constraints
* 1 ≤ n ≤ 100,000
* 0 ≤ wi ≤ 1,000
Input
n
s1 t1 w1
s2 t2 w2
:
sn-1 tn-1 wn-1
The first line consists of an integer n which repre... | ```python
import sys
readline = sys.stdin.readline
from collections import deque
from math import isinf
INF = float("inf")
sys.setrecursionlimit(200000)
n = int(readline())
G = [[] for _ in range(n)]
D = [INF] * n
for _ in [0] * (n - 1):
s, t, w = map(int, readline().split())
G[s].append([t, w])
G[t].append... |
1011_E. Border | Astronaut Natasha arrived on Mars. She knows that the Martians are very poor aliens. To ensure a better life for the Mars citizens, their emperor decided to take tax from every tourist who visited the planet. Natasha is the inhabitant of Earth, therefore she had to pay the tax to enter the territory of Mars.
There are... | ```python
from functools import reduce
from math import gcd
n, k = map(int, input().split())
A = list(map(int, input().split()))
G = gcd(k, reduce(lambda x,y:gcd(x,y),A))
print(k // G)
print(*list(range(0, k, G)))
``` |
1036_F. Relatively Prime Powers | Consider some positive integer x. Its prime factorization will be of form x = 2^{k_1} ⋅ 3^{k_2} ⋅ 5^{k_3} ⋅ ...
Let's call x elegant if the greatest common divisor of the sequence k_1, k_2, ... is equal to 1. For example, numbers 5 = 5^1, 12 = 2^2 ⋅ 3, 72 = 2^3 ⋅ 3^2 are elegant and numbers 8 = 2^3 (GCD = 3), 2500 = 2... | ```python
from math import sqrt, log2
from sys import stdin
from bisect import bisect
import time
def all_primes(n):
res = []
for i in range(1, n+1):
prime = True
for j in range(2, min(int(sqrt(i))+2, i)):
if i % j == 0:
prime = False
break
if... |
1059_E. Split the Tree | You are given a rooted tree on n vertices, its root is the vertex number 1. The i-th vertex contains a number w_i. Split it into the minimum possible number of vertical paths in such a way that each path contains no more than L vertices and the sum of integers w_i on each path does not exceed S. Each vertex should belo... | ```python
from collections import defaultdict
import sys
def rec(n, l, s):
# dp[i] is a doctionary, where key is the chain length
# and value is the weight at node i
dp = [{} for _ in range(n)]
ans = 0
for cur in range(n - 1, -1, -1):
child_of_cur = children.get(cur, None)
if not c... |
1081_A. Definite Game | Chouti was doing a competitive programming competition. However, after having all the problems accepted, he got bored and decided to invent some small games.
He came up with the following game. The player has a positive integer n. Initially the value of n equals to v and the player is able to do the following operatio... | ```python
v = int(input())
print(2 if v == 2 else 1)
``` |
1100_A. Roman and Browser | This morning, Roman woke up and opened the browser with n opened tabs numbered from 1 to n. There are two kinds of tabs: those with the information required for the test and those with social network sites. Roman decided that there are too many tabs open so he wants to close some of them.
He decided to accomplish this... | ```python
from collections import Counter
import math
n,m=map(int,input().split())
l=list(map(int,input().split()))
c=Counter(l)
a1=c[1]
a2=c[-1]
i=0
s=[]
a=0
b=0
while(i<m):
for j in range(i,n,m):
if l[j]>0:
a+=1
else:
b+=1
s+=[abs(a1-a2+b-a)]
a=0
b=0
i+=1
print(max(s))
``` |
1121_E. Once in a casino | One player came to a casino and found a slot machine where everything depends only on how he plays. The rules follow.
A positive integer a is initially on the screen. The player can put a coin into the machine and then add 1 to or subtract 1 from any two adjacent digits. All digits must remain from 0 to 9 after this o... | ```python
def main():
n = int(input())
a = list(map(int, (x for x in input())))
b = list(map(int, (x for x in input())))
x = [0] * (n - 1)
x[0] = b[0] - a[0]
for i in range(1, n - 1):
x[i] = b[i] - a[i] - x[i - 1]
if a[n - 1] + x[n - 2] != b[n - 1]:
print(-1)
return
... |
116_D. Lawnmower | You have a garden consisting entirely of grass and weeds. Your garden is described by an n × m grid, with rows numbered 1 to n from top to bottom, and columns 1 to m from left to right. Each cell is identified by a pair (r, c) which means that the cell is located at row r and column c. Each cell may contain either gras... | ```python
n, m = map(int, input().split())
t = [(p.find('W'), p.rfind('W')) for p in [input() for i in range(n)]]
c, s, k = 0, n - 1, True
while s > 0 and t[s][0] == -1: s -= 1
for a, b in t[: s + 1]:
if a != -1:
if k:
s += abs(a - c) + b - a
c = b
else:
... |
1188_C. Array Beauty | Let's call beauty of an array b_1, b_2, …, b_n (n > 1) — min_{1 ≤ i < j ≤ n} |b_i - b_j|.
You're given an array a_1, a_2, … a_n and a number k. Calculate the sum of beauty over all subsequences of the array of length exactly k. As this number can be very large, output it modulo 998244353.
A sequence a is a subsequenc... | ```python
from collections import defaultdict
import sys
input = sys.stdin.readline
'''
for CASES in range(int(input())):
n, m = map(int, input().split())
n = int(input())
A = list(map(int, input().split()))
S = input().strip()
sys.stdout.write(" ".join(map(str,ans))+"\n")
'''
inf = 100000000000000000 # 1e17
mod = 998... |
1207_D. Number Of Permutations | You are given a sequence of n pairs of integers: (a_1, b_1), (a_2, b_2), ... , (a_n, b_n). This sequence is called bad if it is sorted in non-descending order by first elements or if it is sorted in non-descending order by second elements. Otherwise the sequence is good. There are examples of good and bad sequences:
... | ```python
from collections import defaultdict
import math
MOD = 998244353
def facmod(n):
fac = 1
for i in range(2, n + 1):
fac *= i
fac %= MOD
return fac
def main():
n = int(input())
s = [tuple(int(s) for s in input().split()) for _ in range(n)]
count = defaultdict(int... |
1225_E. Rock Is Push | You are at the top left cell (1, 1) of an n × m labyrinth. Your goal is to get to the bottom right cell (n, m). You can only move right or down, one cell per step. Moving right from a cell (x, y) takes you to the cell (x, y + 1), while moving down takes you to the cell (x + 1, y).
Some cells of the labyrinth contain r... | ```python
def getSum(dp, pos, s, e, type_):
if e < s:
return 0
if type_=='D':
if e==m-1:
return dp[pos][s]
return dp[pos][s]-dp[pos][e+1]
else:
if e==n-1:
return dp[s][pos]
return dp[s][pos]-dp[e+1][pos]
mod = 10**9+7
n, m = map(i... |
124_A. The number of positions | Petr stands in line of n people, but he doesn't know exactly which position he occupies. He can say that there are no less than a people standing in front of him and no more than b people standing behind him. Find the number of different positions Petr can occupy.
Input
The only line contains three integers n, a and ... | ```python
x,y,z=map(int,input().split())
if y+z>=x:
print(x-y)
else:
print(z+1)
``` |
1333_D. Challenges in school №41 | There are n children, who study at the school №41. It is well-known that they are good mathematicians. Once at a break, they arranged a challenge for themselves. All children arranged in a row and turned heads either to the left or to the right.
Children can do the following: in one second several pairs of neighboring... | ```python
#!/usr/bin/env python
from __future__ import division, print_function
import os
import sys
from io import BytesIO, IOBase
if sys.version_info[0] < 3:
from __builtin__ import xrange as range
from future_builtins import ascii, filter, hex, map, oct, zip
def main():
n , k = [int(n) for n in inp... |
1354_A. Alarm Clock | Polycarp has spent the entire day preparing problems for you. Now he has to sleep for at least a minutes to feel refreshed.
Polycarp can only wake up by hearing the sound of his alarm. So he has just fallen asleep and his first alarm goes off in b minutes.
Every time Polycarp wakes up, he decides if he wants to sleep... | ```python
for i in range(int(input())):
a,b,c,d=map(int,input().split())
e=a-b
if e<1:
print(b)
continue
else:
if c-d<1:
print(-1)
continue
else:
f=int(e//(c-d))
if b+f*(c-d)>=a:
print(b+f*c)
else... |
1373_F. Network Coverage | The government of Berland decided to improve network coverage in his country. Berland has a unique structure: the capital in the center and n cities in a circle around the capital. The capital already has a good network coverage (so the government ignores it), but the i-th city contains a_i households that require a co... | ```python
from bisect import bisect_left as bl
from bisect import bisect_right as br
from heapq import heappush,heappop
import math
from collections import *
from functools import reduce,cmp_to_key,lru_cache
import io, os
input = io.BytesIO(os.read(0,os.fstat(0).st_size)).readline
# import sys
# input = sys.stdin.readl... |
1420_B. Rock and Lever | "You must lift the dam. With a lever. I will give it to you.
You must block the canal. With a rock. I will not give the rock to you."
Danik urgently needs rock and lever! Obviously, the easiest way to get these things is to ask Hermit Lizard for them.
Hermit Lizard agreed to give Danik the lever. But to get a stone... | ```python
def nCr(n, k):
if k > n:
return 0
if(k > n - k):
k = n - k
res = 1
for i in range(k):
res = res * (n - i)
res = res / (i + 1)
return int(res)
for _ in range(int(input())):
N = int(input())
a = list(map(int, input().split()))
d = {}
for i in range(len(a)):
a[i] = bin(a[... |
1439_A1. Binary Table (Easy Version) | This is the easy version of the problem. The difference between the versions is in the number of possible operations that can be made. You can make hacks if and only if you solved both versions of the problem.
You are given a binary table of size n × m. This table consists of symbols 0 and 1.
You can make such operat... | ```python
import sys
input=sys.stdin.readline
def change(x1,x2,x3,y1,y2,y3,ll):
ll[x1][y1]=1-ll[x1][y1]
ll[x2][y2]=1-ll[x2][y2]
#print(x3,y3,ll)
ll[x3][y3]=1-ll[x3][y3]
t=int(input())
while t:
n,m=map(int,input().split())
ll=[]
for i in range(n):
l=list(map(int,input().strip())... |
1490_A. Dense Array | Polycarp calls an array dense if the greater of any two adjacent elements is not more than twice bigger than the smaller. More formally, for any i (1 ≤ i ≤ n-1), this condition must be satisfied: $$$(max(a[i], a[i+1]))/(min(a[i], a[i+1])) ≤ 2$$$
For example, the arrays [1, 2, 3, 4, 3], [1, 1, 1] and [5, 10] are dense.... | ```python
for _ in range(int(input())):
n=int(input())
l=list(map(int,input().split()))
s=0
for i in range(n-1):
a=max(l[i],l[i+1])
b=min(l[i],l[i+1])
while a>(2*b):
s+=1
b=b*2
print(s)
``` |
1512_D. Corrupted Array | You are given a number n and an array b_1, b_2, …, b_{n+2}, obtained according to the following algorithm:
* some array a_1, a_2, …, a_n was guessed;
* array a was written to array b, i.e. b_i = a_i (1 ≤ i ≤ n);
* The (n+1)-th element of the array b is the sum of the numbers in the array a, i.e. b_{n+1} = a_1... | ```python
for _ in range(int(input())):
n = int(input())
a = sorted(list(map(int,input().split())))
ans = [0]*(n+2)
ans[0] = a[0]
for i in range(1,n+2):
ans[i] = ans[i-1] + a[i]
#print(ans)
j = -1
for i in range(n+2):
if n + 1 != i:
if a[n+1] == ans[n] - a[i]:... |
166_E. Tetrahedron | You are given a tetrahedron. Let's mark its vertices with letters A, B, C and D correspondingly.
<image>
An ant is standing in the vertex D of the tetrahedron. The ant is quite active and he wouldn't stay idle. At each moment of time he makes a step from one vertex to another one along some edge of the tetrahedron. T... | ```python
def fast_exp_pow(num, pw, mod):
num %= mod
if pw == 1:
return num
evener = 1
if pw % 2 == 1:
evener = num
return (evener * (fast_exp_pow(num, pw // 2, mod) % mod) ** 2) % mod
mod = 1000000007
n = int(input())
if n == 1:
print(0)
quit()
x = ((fast_exp_pow(3, n - 1, mod) + (-1) ** (n & 1) + mod) * ... |
208_D. Prizes, Prizes, more Prizes | Vasya, like many others, likes to participate in a variety of sweepstakes and lotteries. Now he collects wrappings from a famous chocolate bar "Jupiter". According to the sweepstake rules, each wrapping has an integer written on it — the number of points that the participant adds to his score as he buys the bar. After ... | ```python
import bisect
n = int(input())
a = [int(x) for x in input().split()]
p = [int(x) for x in input().split()]
b = [0, 0, 0, 0, 0]
s = 0
for i in a:
s += i
k = bisect.bisect_right(p, s)
while k != 0:
if (k == 5) or (p[k] > s):
k -= 1
b[k] += s // p[k]
s %= p[k]
... |
25_A. IQ test | Bob is preparing to pass IQ test. The most frequent task in this test is to find out which one of the given n numbers differs from the others. Bob observed that one number usually differs from the others in evenness. Help Bob — to check his answers, he needs a program that among the given n numbers finds one that is di... | ```python
n=int(input())
q=list(map(int,input().split()))
eve,eve_indx,neg,neg_indx=0,0,0,0
for i in range(n):
x=q[i]%2
if x==0:
eve +=1
eve_indx=i
else:
neg +=1
neg_indx=i
if eve==1:
print(eve_indx+1)
else:
print(neg_indx+1)
``` |
283_A. Cows and Sequence | Bessie and the cows are playing with sequences and need your help. They start with a sequence, initially containing just the number 0, and perform n operations. Each operation is one of the following:
1. Add the integer xi to the first ai elements of the sequence.
2. Append an integer ki to the end of the sequenc... | ```python
from sys import stdin
input = stdin.readline
n = int(input())
arr, cnt, curr_len, curr_sum = [0] * (n+1), [0] * (n+1), 1, 0
for _ in range(n):
s = input()
if s[0] == '1':
_, x, y = map(int, s.split())
curr_sum += x*y
cnt[x-1] += y
elif s[0] == '2':
_, x = map(int, s... |
305_E. Playing with String | Two people play the following string game. Initially the players have got some string s. The players move in turns, the player who cannot make a move loses.
Before the game began, the string is written on a piece of paper, one letter per cell.
<image> An example of the initial situation at s = "abacaba"
A player's ... | ```python
U = input()
memo = {}
DP = [0]*(len(U)+1)
DP[0] = 0
for j in range(1, len(U) + 1):
s = set()
for i in range(j):
s.add(DP[max(0, i - 1)] ^ DP[max(0, j - i - 2)])
mex = 0
while mex in s:
mex += 1
DP[j] = mex
memo2 = {}
def Grundy(S):
"""
Basically we transform ... |
331_C2. The Great Julya Calendar | Yet another Armageddon is coming! This time the culprit is the Julya tribe calendar.
The beavers in this tribe knew math very well. Smart Beaver, an archaeologist, got a sacred plate with a magic integer on it. The translation from Old Beaverish is as follows:
"May the Great Beaver bless you! May your chacres open ... | ```python
c = '0123456789'
F = {c[a] + c[b]: (c[10 - a + b], 1) if a > b else (c[10 - a], 2) for a in range(1, 10) for b in range(10)}
for b in range(1, 10): F['0' + c[b]] = ('0', 1)
F['00'] = ('0', 0)
def f(x):
global F
if x in F: return F[x]
a, b, y, s = int(x[0]), int(x[1]), x[2: ], 0
for i in range... |
353_D. Queue | There are n schoolchildren, boys and girls, lined up in the school canteen in front of the bun stall. The buns aren't ready yet and the line is undergoing some changes.
Each second all boys that stand right in front of girls, simultaneously swap places with the girls (so that the girls could go closer to the beginning... | ```python
# ---------------------------iye ha aam zindegi---------------------------------------------
import math
import random
import heapq,bisect
import sys
from collections import deque, defaultdict
from fractions import Fraction
import sys
import threading
from collections import defaultdict
threading.stack_size(1... |
39_B. Company Income Growth | Petya works as a PR manager for a successful Berland company BerSoft. He needs to prepare a presentation on the company income growth since 2001 (the year of its founding) till now. Petya knows that in 2001 the company income amounted to a1 billion bourles, in 2002 — to a2 billion, ..., and in the current (2000 + n)-th... | ```python
_, values,i,years = int(input()),[int(i) for i in input().split(" ")],1,[]
if 1 in values:
years.append(values.index(1))
i=2
while i in values[years[-1]:]:
years.append(values[years[-1]:].index(i)+years[-1])
i+=1
print(len(years))
if len(years) !=0:
for year in years:
print(2001+year,end=" ")
print... |
424_C. Magic Formulas | People in the Tomskaya region like magic formulas very much. You can see some of them below.
Imagine you are given a sequence of positive integer numbers p1, p2, ..., pn. Lets write down some magic formulas:
<image><image>
Here, "mod" means the operation of taking the residue after dividing.
The expression <image> ... | ```python
import sys
input=sys.stdin.readline
n=int(input())
ar=list(map(int,input().split()))
dp=[0]
pre=0
for i in range(1,n+1):
pre^=i
dp.append(pre)
ans=0
for i in range(1,n+1):
xx=ar[i-1]^(dp[i-1]*((n//i)%2))^(dp[n%i])
ans^=xx
print(ans)
``` |
449_A. Jzzhu and Chocolate | Jzzhu has a big rectangular chocolate bar that consists of n × m unit squares. He wants to cut this bar exactly k times. Each cut must meet the following requirements:
* each cut should be straight (horizontal or vertical);
* each cut should go along edges of unit squares (it is prohibited to divide any unit choc... | ```python
l = input().split()
n = int(l[0])
m = int(l[1])
k = int(l[2])
if ( k <= n+m-2 ):
if ( k < n ):
outn = int((n / (k + 1))) * m
else:
outn = int(m / (k - n + 2))
if ( k < m):
outm = int( m / ( k + 1)) * n
else:
outm = int( n / ( k - m + 2 ))
print ("", max( ou... |
493_C. Vasya and Basketball | Vasya follows a basketball game and marks the distances from which each team makes a throw. He knows that each successful throw has value of either 2 or 3 points. A throw is worth 2 points if the distance it was made from doesn't exceed some value of d meters, and a throw is worth 3 points if the distance is larger tha... | ```python
n = int(input())
score = list(map(lambda x: [int(x), 0], input().split()))
m = int(input())
score += list(map(lambda x: [int(x), 1], input().split()))
score.sort()
f = []
if score[0][1] == 0:
f.append([1, 0])
else:
f.append([0, 1])
for i in range(1, n + m):
if score[i][1] == 0:
f.appe... |
518_B. Tanya and Postcard | Little Tanya decided to present her dad a postcard on his Birthday. She has already created a message — string s of length n, consisting of uppercase and lowercase English letters. Tanya can't write yet, so she found a newspaper and decided to cut out the letters and glue them into the postcard to achieve string s. The... | ```python
# Tanya and Postcard
from collections import Counter
def to_dict(s):
d = Counter()
for c in s:
d[c] += 1
return d
def change_case(c):
if c.islower():
return c.upper()
else:
return c.lower()
yay_total = 0
whoops_total = 0
tanya = to_dict(input())
newspaper = to_d... |
544_B. Sea and Islands | A map of some object is a rectangular field consisting of n rows and n columns. Each cell is initially occupied by the sea but you can cover some some cells of the map with sand so that exactly k islands appear on the map. We will call a set of sand cells to be island if it is possible to get from each of them to each ... | ```python
n,k=input().split()
n,k=int(n),int(k)
if k>(n*n+1)//2:
print("NO")
exit()
print("YES")
for i in range(0,n):
for j in range(0,n):
if((i+j)%2==0 and k>0):
print('L',end='')
k-=1
else:
print('S',end='')
print()
# Made By ... |
592_B. The Monster and the Squirrel | Ari the monster always wakes up very early with the first ray of the sun and the first thing she does is feeding her squirrel.
Ari draws a regular convex polygon on the floor and numbers it's vertices 1, 2, ..., n in clockwise order. Then starting from the vertex 1 she draws a ray in the direction of each other vertex... | ```python
n=int(input())
N=0
for i in range(2,n):
N=N+2*i-3
print(N)
``` |
686_C. Robbers' watch | Robbers, who attacked the Gerda's cab, are very successful in covering from the kingdom police. To make the goal of catching them even harder, they use their own watches.
First, as they know that kingdom police is bad at math, robbers use the positional numeral system with base 7. Second, they divide one day in n hour... | ```python
read = lambda: map(int, input().split())
n, m = read()
from itertools import permutations, combinations
cnt = 0
p1 = 0
x1 = 1
while x1 <= n - 1:
x1 *= 7
p1 += 1
p2 = 0
x2 = 1
while x2 <= m - 1:
x2 *= 7
p2 += 1
p1, p2 = max(p1, 1), max(p2, 1)
Len = p1 + p2
for comb in combinations([0, 1, 2, ... |
709_B. Checkpoints | Vasya takes part in the orienteering competition. There are n checkpoints located along the line at coordinates x1, x2, ..., xn. Vasya starts at the point with coordinate a. His goal is to visit at least n - 1 checkpoint in order to finish the competition. Participant are allowed to visit checkpoints in arbitrary order... | ```python
n, a = map(int, input().split())
x = list(map(int, input().split()))
if n == 1:
print(0)
elif n == 2:
if abs(x[0]-a) < abs(x[1]-a):
print(abs(x[0]-a))
else:
print(abs(x[1]-a))
elif n == 3:
x = sorted(x)
_min = x[0]
_mid = x[1]
_max = x[2]
ans = abs(_max - a)*2 ... |
774_H. Repairing Of String | Stepan had a favorite string s which consisted of the lowercase letters of the Latin alphabet.
After graduation, he decided to remember it, but it was a long time ago, so he can't now remember it. But Stepan remembers some information about the string, namely the sequence of integers c1, c2, ..., cn, where n equals t... | ```python
n = int(input())
arr = list(map(int, input().split()))
for i in range(n-1, 0, -1):
for j in range(i-1, -1, -1):
arr[j] -= arr[i]*(i-j+1)
s = "a"
def rev(c):
if c == "a":
return "b"
else:
return "a"
for i in range(n):
for j in range(arr[i]):
s += rev(s[-1])*(i+1)... |
79_A. Bus Game | After Fox Ciel won an onsite round of a programming contest, she took a bus to return to her castle. The fee of the bus was 220 yen. She met Rabbit Hanako in the bus. They decided to play the following game because they got bored in the bus.
* Initially, there is a pile that contains x 100-yen coins and y 10-yen coi... | ```python
player_one = 'Ciel'
player_two = 'Hanako'
c100, c10 = map(int, input().split())
full_moves = min([c100 // 2, c10 // 24])
c100 -= full_moves * 2
c10 -= full_moves * 24
while True:
if 100 * c100 + 10 * c10 >= 220 and c10 >= 2:
tmp = min([2, c100])
c100 -= tmp
c10 -= (220 - 100... |
81_C. Average Score | After the educational reform Polycarp studies only two subjects at school, Safety Studies and PE (Physical Education). During the long months of the fourth term, he received n marks in them. When teachers wrote a mark in the journal, they didn't write in what subject the mark was for, they just wrote the mark.
Now it'... | ```python
from operator import itemgetter
from collections import defaultdict
n=int(input())
a,b= map(int,input().split())
arr= list(map(int,input().split()))
arr = list(enumerate(arr,0))
arr=sorted(arr,key=itemgetter(1),reverse=True)
def find_min(num1,num2):
if num1<num2:
return num1
else:
ret... |
867_A. Between the Offices | As you may know, MemSQL has American offices in both San Francisco and Seattle. Being a manager in the company, you travel a lot between the two cities, always by plane.
You prefer flying from Seattle to San Francisco than in the other direction, because it's warmer in San Francisco. You are so busy that you don't rem... | ```python
print((lambda s: 'YES' if s[1][0] == 'S' and s[1][-1] == 'F' else 'NO')((input(), input().strip())))
``` |
892_C. Pride | You have an array a with length n, you can perform operations. Each operation is like this: choose two adjacent elements from a, say x and y, and replace one of them with gcd(x, y), where gcd denotes the [greatest common divisor](https://en.wikipedia.org/wiki/Greatest_common_divisor).
What is the minimum number of ope... | ```python
import math
n=int(input())
a=list(map(int,input().split()))
x=[1 for x in a if x==1]
x=len(x)
if(x>=1):
print(n-x)
quit()
ans=n
for i in range(n):
g=a[i]
for j in range(i,n):
g=math.gcd(g,a[j])
if(g==1): ans=min(ans,j-i)
if(ans==n): print(-1)
else: print(ans+n-1)
``` |
914_C. Travelling Salesman and Special Numbers | The Travelling Salesman spends a lot of time travelling so he tends to get bored. To pass time, he likes to perform operations on numbers. One such operation is to take a positive integer x and reduce it to the number of bits set to 1 in the binary representation of x. For example for number 13 it's true that 1310 = 11... | ```python
def Numb(a,k):
if a == 0:
return 0
m = len(bin(a))-3
if m + 1 < k:
return 0
if k == 1:
return m+1
if m + 1 == k:
return Numb(a & ((1<<m)-1), k-1)
return C[m][k]+Numb(a & ((1<<m)-1), k-1)
s = input()
nDec = int(s,2)
n = len(s)
k = int(input())
C = [[1],... |
937_A. Olympiad | The recent All-Berland Olympiad in Informatics featured n participants with each scoring a certain amount of points.
As the head of the programming committee, you are to determine the set of participants to be awarded with diplomas with respect to the following criteria:
* At least one participant should get a dip... | ```python
n = int(input())
a = [0] * 601
for x in input().split():
a[int(x)] = 1
a[0] = 0
print(sum(a))
``` |
962_C. Make a Square | You are given a positive integer n, written without leading zeroes (for example, the number 04 is incorrect).
In one operation you can delete any digit of the given integer so that the result remains a positive integer without leading zeros.
Determine the minimum number of operations that you need to consistently ap... | ```python
'''input
101
'''
from itertools import chain, combinations
def binarysearch(arr, x):
l = 0
r = len(arr) - 1
while l <= r:
mid = l + (r - l) // 2
if arr[mid] == x:
return mid
elif arr[mid] < x:
l = mid + 1
else:
r = mid - 1
re... |
p02607 AIsing Programming Contest 2020 - An Odd Problem | We have N squares assigned the numbers 1,2,3,\ldots,N. Each square has an integer written on it, and the integer written on Square i is a_i.
How many squares i satisfy both of the following conditions?
* The assigned number, i, is odd.
* The written integer is odd.
Constraints
* All values in input are integers.
* ... | ```python
input()
print(len([i for n,i in enumerate(map(int,input().split()),1) if i%2==1 and n%2]))
``` |
p02738 AtCoder Grand Contest 043 - Merge Triplets | Given is a positive integer N. Find the number of permutations (P_1,P_2,\cdots,P_{3N}) of (1,2,\cdots,3N) that can be generated through the procedure below. This number can be enormous, so print it modulo a prime number M.
* Make N sequences A_1,A_2,\cdots,A_N of length 3 each, using each of the integers 1 through 3N ... | ```python
from functools import lru_cache
N, M = map(int, input().split())
@lru_cache(maxsize=None)
def mod_inv(x):
x1, y1, z1 = 1, 0, x
x2, y2, z2 = 0, 1, M
while z1 != 1:
d, m = divmod(z2, z1)
x1, x2 = x2-d*x1, x1
y1, y2 = y2-d*y1, y1
z1, z2 = m, z1
return x1%M
def gen_Y(i):
# sC2/1, (s-2... |
p02873 AtCoder Grand Contest 040 - >< | Given is a string S of length N-1. Each character in S is `<` or `>`.
A sequence of N non-negative integers, a_1,a_2,\cdots,a_N, is said to be good when the following condition is satisfied for all i (1 \leq i \leq N-1):
* If S_i= `<`: a_i<a_{i+1}
* If S_i= `>`: a_i>a_{i+1}
Find the minimum possible sum of the ele... | ```python
S = input().rstrip("\n")
N = len(S)
a = [0] * (N+1)
for i in range(N):
if S[i] == "<":
a[i+1] = max(a[i+1], a[i] + 1)
for i in range(N-1,-1,-1):
if S[i] == ">":
a[i] = max(a[i], a[i+1]+1)
print(sum(a))
``` |
p03007 diverta 2019 Programming Contest 2 - Successive Subtraction | There are N integers, A_1, A_2, ..., A_N, written on a blackboard.
We will repeat the following operation N-1 times so that we have only one integer on the blackboard.
* Choose two integers x and y on the blackboard and erase these two integers. Then, write a new integer x-y.
Find the maximum possible value of the... | ```python
n,*a=map(int,open(0).read().split())
a.sort()
print(sum(abs(i)for i in a)-2*min(abs(a[-1]),abs(a[0]))*(a[0]*a[-1]>0))
if a[0]>0:
print(a[0],a[-1])
a[0]-=a[-1]
for i in a[1:-2]:
print(a[0],i)
a[0]-=i
print(a[-2],a[0])
elif a[-1]<0:
for i in a[:-1]:
print(a[-1],i)
... |
p03147 AtCoder Beginner Contest 116 - Grand Garden | In a flower bed, there are N flowers, numbered 1,2,......,N. Initially, the heights of all flowers are 0. You are given a sequence h=\\{h_1,h_2,h_3,......\\} as input. You would like to change the height of Flower k to h_k for all k (1 \leq k \leq N), by repeating the following "watering" operation:
* Specify integers... | ```python
n = int(input())
h = list(map(int,input().split()))
ans = h[0]
for i in range(1,n):
if h[i-1] < h[i]:
ans += h[i]-h[i-1]
print(ans)
``` |
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