text stringlengths 180 608k |
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* This site is for programming contests and challenges. **General programming questions** are off-topic here. You may be able to get help on [Stack Overflow](http://s... |
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I have a lot of java projects and I am often making new ones. I have a few helper classes (Vector, Logger, etc.) and it takes a lot of time correcting the first line to the correct package, I would really need a little program to help me fix it automatically.
Your program will first take the name of... |
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**fastest relay time** = lowest possible total integer value of
(a freestyle swimmers time) + (1 breastroke swimmers time) + (another backstroke swimmers time) + (another butterfly swimmers time)
* Each swimmer must be unique to the relay (no duplicates)
* Each stroke must be used once
Input Data: a... |
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[
Ok lets say we get a input the following csv file (all entries are quoted strings)
```
ID, Before, After, Value
1, 3, 5, Cat
2, 5, , Apple
3, 4, 1, Dog
4, , 3, Elephant
5, 1, 2, Banana
```
Output a csv... |
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**This question already has answers here**:
[Hangman wordgame golf](/questions/2161/hangman-wordgame-golf)
(10 answers)
Closed 10 years ago.
Although there was a [hangman competition](https://codegolf.stackexchange.com/questions/2161/hangman-wordgame-golf) before, I don't feel it was beautiful... |
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You have an array of working time period pairs (from, till) received from user input and written according 24-hour clock format convention.
You have to merge these periods if the intersect each other.
For example, if you have (10, 12), (11, 13), (12, 14) you should merge them into (10,14).
Also (2... |
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Write shortest code that detect how many swaps (minimum) are needed to sort (in increasing order) any array of unique positive integers. It should be fast enough to detect number of swaps in array of 1'000'000 integers in decreasing order in 1-2 minutes.
### Refs
* [Bubble Sort on Wiki](http://en.wik... |
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Given a string consisting of only printable ascii (letters, numbers, symbols, and spaces), how many keystrokes are required minimally to type out this string from scratch?
That is, *current text* is initially an empty string and should end up being equal to the input string. These are the allowed act... |
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Your task is simple: Write a program (or function) that takes no input and outputs something like this:
```
## *name*, *length* bytes
*code*
```
Where `*name*` is the name of the language you are using, `*length*` is the number of bytes in your code, and `*code*` is your program's source code. If... |
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**This question already has answers here**:
[Exact Partial Sum of Harmonic Series](/questions/168700/exact-partial-sum-of-harmonic-series)
(17 answers)
[Fraction to exact decimal](/questions/89215/fraction-to-exact-decimal)
(6 answers)
Closed last month.
Consider the sequence 1/2, 1/3 + 1/2... |
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The [Fibonacci sequence](http://oeis.org/A000045) is a sequence of numbers, where every number in the sequence is the sum of the two numbers preceding it. The first two numbers in the sequence are both 1. Here are the first few terms:
```
1 1 2 3 5 8 13 21 34 55 89 ...
```
---
Write the shortest code... |
[Question]
[
Every integer can be expressed in powers of 2. You know this as the binary system
Assume you are given a set of `k` numbers (`0 < k < 2^n`).
You want to decide for this set whether every integer power of 2 up to `2^(n-1)` occurs at least `m` times
One example:
```
n = 7 (2^n = 128, )
k = 5
set =
{10... |
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# Create a Sudoku solution CHECKER
There are oodles of Sudoku SOLVERS here, but I want you to create a solution CHECKER as small as humanly possible (code-golf).
* A valid entry will be able to either take a 9x9 array as an argument (passed by reference, serialized on the command line, or however yo... |
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I would like to generate (as a return result of a function, or simply as the output of a program) the [ordinal](http://en.wikipedia.org/wiki/Ordinal_number_%28linguistics%29) suffix of a positive integer concatenated to the number.
Samples:
```
1st
2nd
3rd
4th
...
11th
12th
13th
... ... |
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[
**This question already has answers here**:
[Find the temperature closest to 0](/questions/112021/find-the-temperature-closest-to-0)
(36 answers)
Closed 5 years ago.
# Description :
You are given a string of numbers (positive and negative but not decimals) along with the number of entries like... |
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[
# Challenge
Implement binary search on a list of length 256 with no branches.
# Specification
* Input an integer `X` and a strictly increasing list of integers
* Output is the greatest element of the list that is less than or equal to `X`
* The output will always exist
* List will always have exactly... |
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**Challenge**
You will create a function which takes a matrix filled with letters from the alphabet and determine if a `2x2` square composed of vowels exists.
* If a 2x2 square of vowels is found, your function should return the top-left position (row-column) of the square.
* If no 2x2 square of vowe... |
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## Assumption
A cigarette can be made by combining four cigarette butts. Cigarette butts last infinitely until smoked.
## Explanation
Say you have 31 butts. That means, you can make 7 cigarettes from 28 butts and have 3 left over.
Now, these 7 cigarettes will yield 7 butts when you're done smoking ... |
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Given string `S` representing a dollar amount, make change for that amount of money use the least number of coins to make the change and record the amount of each coin in a list. Here are the coins available to use and their value.
```
Coin : Value
Dollar Coins : $1.00
Quarters: $0.25
Dimes: $0.10
Ni... |
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I want format a JSON string into human-readable form. A string like this:
```
'{"foo":"hello","bar":"world","c":[1,55,"bye"]}'
```
would be formatted as:
```
{
"foo": "hello",
"bar": "world",
"c": [
1,
55,
"bye"
]
}
```
**Rules:**
1. For objects and arrays properties and items sho... |
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**This question already has answers here**:
[Return 1 - Popularity Contest [closed]](/questions/12141/return-1-popularity-contest)
(70 answers)
Closed 10 years ago.
Today, [Numberphile](https://www.youtube.com/user/numberphile) posted [this video](https://www.youtube.com/watch?v=w-I6XTVZXww) w... |
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Hehe, see what I did with the title? Anyways...
Your job is to create a sudoku solver that accepts input in Morse code and creates output in Morse code. Here's the Morse code numbers for reference:
```
0: -----
1: .----
2: ..---
3: ...--
4: ....-
5: .....
6: -....
7: --...
8: ---..
9: ----.... |
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# Task:
Take a string as input and if it meets the requirements, accept the password.
**Input**: a string, e.g. `someString`, `asjk23t89h`, `123456789abcdef`.
**Output**: two distinct values representing "secure" and "insecure", e.g. `0`/`1`, `true`/`false`, `secure`/`insecure`.
# Password requiremen... |
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**This question already has answers here**:
[How many syllables in that number?](/questions/177586/how-many-syllables-in-that-number)
(13 answers)
Closed 4 months ago.
# Task
Your boss is on another crusade for 'efficiency.' He wants to encourage the use of numbers with fewer syllables, so tha... |
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[
**This question already has answers here**:
[Sum of primes between given range](/questions/113/sum-of-primes-between-given-range)
(61 answers)
Closed 7 months ago.
Given a number x, find the sum of all primes up to that number.
The input will always be a positive number, bigger than 2. An uppe... |
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[
**This question already has answers here**:
[Build a typing speed test / measuring CPM](/questions/5763/build-a-typing-speed-test-measuring-cpm)
(9 answers)
Closed 11 months ago.
# Description
a typeracer is an apps where user could type and evaluate their typing speed and accuracy.
# Criteria... |
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[
**This question already has answers here**:
[Line ending conversion program](/questions/101374/line-ending-conversion-program)
(3 answers)
Closed 3 years ago.
Inspired by what I'm doing at work right now.
Your program should take one parameter, the path to the file
It should convert all the wi... |
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[
**This question already has answers here**:
[Remove common leading spaces](/questions/53219/remove-common-leading-spaces)
(30 answers)
Closed 5 years ago.
Write a program which removes any common leading spaces from the input string. For example, if the *least* indented line started with 3 spa... |
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[
**This question already has answers here**:
[Determine if an integer is a palindrome in a given radix (base)](/questions/22449/determine-if-an-integer-is-a-palindrome-in-a-given-radix-base)
(22 answers)
Closed 5 years ago.
write a function to tell if a number is symmetric or not.
for example:... |
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[
**This question already has answers here**:
[AlTeRnAtE tHe CaSe](/questions/122783/alternate-the-case)
(41 answers)
Closed 5 years ago.
Your goal is to alternate uppercase and lowercase letters, while ignoring non-alphaneumeric characters.
```
Input => Output
abc => aBc OR AbC
a c => A c OR a ... |
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[
**This question already has answers here**:
[Mozilla/1.0 Mozilla/2.0 Mozilla/3.0 Mozilla/4.0 Mozilla/5.0](/questions/137816/mozilla-1-0-mozilla-2-0-mozilla-3-0-mozilla-4-0-mozilla-5-0)
(5 answers)
Closed 6 years ago.
# Background
Many people visit webpages, which require special browsers becau... |
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[
**This question already has answers here**:
[Print your code backwards - reverse quine](/questions/16021/print-your-code-backwards-reverse-quine)
(72 answers)
Closed 6 years ago.
Well the title says it all.
* Standard loopholes apply
* Nothing to read from stdin, and output goes to stdout
* 1-... |
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[
**This question already has answers here**:
[Three-Three-Three!](/questions/108133/three-three-three)
(94 answers)
Closed 6 years ago.
This is the sequel to one of my previous challenges, [Three-Three-Three!](https://codegolf.stackexchange.com/questions/108133/three-three-three)
---
Write a pr... |
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[
**This question already has answers here**:
[Program that creates larger versions of itself (quine-variant)](/questions/21831/program-that-creates-larger-versions-of-itself-quine-variant)
(64 answers)
[Generate Programs in Increasing size](/questions/69504/generate-programs-in-increasing-size)... |
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**This question already has answers here**:
[Converting integers to English words](/questions/12766/converting-integers-to-english-words)
(14 answers)
Closed 10 years ago.
I took inspiration from a challenge I did some years ago in a programming competition.
Your goal is to write a **function*... |
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[Day of the week of the next Feb 29th](/questions/1003/day-of-the-week-of-the-next-feb-29th)
(12 answers)
Closed 10 years ago.
Knowing a given date (`11/28/1973`), and supposing I will die when I'm 99, what are the years when my birthday will be a th... |
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## Introduction
The challenge itself was something I came across and had to try and figure out for a personal of project of mine. I ended up branching out and asking family members if they could provide an equation to meet the requirements.
**Note:** I have (with the help of others) found a solution ... |
[Question]
[
Print this text:
```
_________
| |
| |
| |
|_________|
```
Shortest code wins. Notice the space at the start of the first line.
[Answer]
# [PowerShell](https://github.com/TryItOnline/TioSetup/wiki/Powershell), ~~40~~ 37 bytes
```
" "+($x="_"*9)
,"|$(" "*9)|"*3
"|$x|"
`... |
[Question]
[
Inspired by [this](https://codegolf.stackexchange.com/questions/66878/find-the-number-in-the-champernowne-constant) and [this](https://codegolf.stackexchange.com/questions/265634/print-100-digits-of-%cf%80) question
#### Challenge
Your challenge is to print any 100 consecutive digits of Champernowne'... |
[Question]
[
`for` loops are useful in python in many ways, but one of the most common usages associated with a `for` loop is it's ability to repeat a certain amount of times. Like this:
```
for times in range(50):
print "I'm repeating this 50 times..."
```
The challenge I propose to you is to make a `for` re... |
[Question]
[
I like patterns in time. My favorite is when the time lines up. For example, all of these line up:
```
3:45
12:34
23:45
3:21
6:54
```
This is because each digit in the hour/minute is increasing/decreasing by one each time.
Your task is to take the current time and check if it "lines up" in this patte... |
[Question]
[
# Background
As you maybe know Ramanujan made this [magic square](https://en.wikipedia.org/wiki/Magic_square) by \$4x4\$ Matrix:
This works like all [magic squares](https://en.wikipedia.org/wiki/Magic_square).
But the special thing in this squ... |
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### Challenge
I think everyone of us heard of URL encoding mechanism - it's basically everywhere.
Given an URLEncoded string on stdin, decode it, and output the decoded form to stdout.
The encoding is very simple, `+` or `%20` is representing space. Every percent followed by two hex digits (uppercase... |
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Imagine simple math problem. You have a number, say it's 1000. And you want to find the next multiple of 32 that follows 1000. You automatically make some simple calculations and get the result. Typical algorithm looks like this:
```
int number = 1000, result;
result = (1 + (number/32)) * 32; // inte... |
[Question]
[
According to [TIO](https://tio.run/) there are two types of programming languages:
* Practical (seen in many corporate environments as a development standard).
* Recreational (if seen in a corporate environment, you're probably fired).
## Your Task
Mix together one language from each of these realms ... |
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**This question already has answers here**:
[All your bijective base are belong to us](/questions/54105/all-your-bijective-base-are-belong-to-us)
(8 answers)
Closed 7 years ago.
# Task
The task is to convert a string to a number. It must accept the string via stdin and output the number via st... |
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# Introduction
An elementary cellular automaton is a cellular automaton that is 1-dimensional and has 2 states, 1 and 0. These cellular automata are categorized based on a simple code: the Wolfram code, invented by Stephen Wolfram (yes, the Wolfram | Alpha guy). It works like this:
* First, you the s... |
[Question]
[
**This question already has answers here**:
[A program that deletes itself](/questions/19355/a-program-that-deletes-itself)
(30 answers)
Closed 6 years ago.
For this code golf challenge, you must produce a .exe runnable on windows. After running this .exe from any path with any name it must be... |
[Question]
[
Make a program that outputs the number of seconds from the beginning of today (00:00:00 of the day you run it) to the second you ran it. However, if this number is divisible by three, print `Fizz` instead. If it is divisible by five, print `Buzz` instead. If it is divisible by three and five, print `... |
[Question]
[
**This question already has answers here**:
[Creating a Crossed Square](/questions/91068/creating-a-crossed-square)
(30 answers)
Closed 5 years ago.
The following problem is a [common interview question](https://www.reddit.com/r/ProgrammerHumor/comments/89uhql/wtf_why_did_i_fail_this_interview... |
[Question]
[
**This question already has answers here**:
[What's the file extension?](/questions/120925/whats-the-file-extension)
(103 answers)
Closed 5 years ago.
Given a printable ASCII string representing a path to a file on a POSIX-compliant system, return just the filename, i.e. remove everything unti... |
[Question]
[
**This question already has answers here**:
[Transpose a 3x3 matrix across the anti-diagonal](/questions/24893/transpose-a-3x3-matrix-across-the-anti-diagonal)
(24 answers)
Closed 6 years ago.
# Objective
To flip the rows and columns of a table in a [code-golf](/questions/tagged/code-golf "sho... |
[Question]
[
Input is a single integer in ascending digit order.
## The **only** valid inputs are:
`12`
`123`
`1234`
`12345`
`123456`
`1234567`
`12345678`
`123456789`
## The **only** valid output is an array (set; list) of `length` equal to the factorial of input:
Input - Factorial of input - Outp... |
[Question]
[
**This question already has answers here**:
[Find the absolute value of a number without built-in functions [closed]](/questions/15668/find-the-absolute-value-of-a-number-without-built-in-functions)
(49 answers)
Closed 5 years ago.
The abs() function in most languages does one thing: give the ... |
[Question]
[
# Intoroduction
If you've ever been to [Epcot](https://commons.wikimedia.org/wiki/File:Epcot_map.png) at Disney World, you've probably been to the world showcase: a lake surrounded by various country-themed locations. One thing that's always bothered me about it is that the countries don't appear in ... |
[Question]
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**Closed.** This question is [off-topic](/help/closed-questions). It is not currently accepting answers.
---
Questions without an **objective primary winning criterion** are off-topic, as they make it impossible to indisputably decide which entry should win.
Closed 8 years ago.
[Improve this que... |
[Question]
[
A string like this one:
"a, 4.25, ((true, 5), 3, (false, false, false)), abc"
Describes a tree with 13 nodes, 9 of which are leaf nodes. In C# the leaf nodes in this example would be of types `string`, `float` and `bool`, this differs between languages and depending on your implementation. The import... |
[Question]
[
I use "sentence" here loosely to mean "any sequence of words separated by spaces" and "words" to mean "sequences of alphanumeric (hexatrigesimal) characters unseparated by spaces".
---
Conversion is from base-36 (0123456789abcdefg...) or (0123456789ABCDEFG...)
Conversion to base-16 (0123456789abcdef)... |
[Question]
[
Here's an example IRC log (this will be your program's input):
```
[01:00] == User [*****] has joined #Channel
[01:00] == ChanServ [ChanServ@services.] has left #Channel []
[01:00] == mode/#Channel [+o User] by ChanServ
[01:00] <Bot> Welcome, User!
[01:01] <User> Hello bot
[01:02] <Bot> Hi there
[01:... |
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Closed last month.
This post was edited and submitted for rev... |
[Question]
[
"Bracket" numerals are a type of 'numerals' I made up once, and thought would be a nice challenge here. Basically, you convert the input number into base 6, and then transliterate the `012345` respectively with `()[]{}`*†*, so every `0` becomes `(`, every `1` becomes `)`, etc.
You don't have to use... |
[Question]
[
**Closed.** This question is [off-topic](/help/closed-questions). It is not currently accepting answers.
---
Closed 8 years ago.
* Questions without an **objective primary winning criterion** are off-topic, as they make it impossible to indisputably decide which entry should win.
* **General pr... |
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[
**Closed**. This question needs [details or clarity](/help/closed-questions). It is not currently accepting answers.
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**This question already has answers here**:
[Interpret brainfuck](/questions/84/interpret-brainfuck)
(78 answers)
Closed 1 year ago.
There [already is](https://codegolf.stackexchange.com/q/84/107299) a Brainfuck interpreter question, but it is from 2011 and not up to date with current site sta... |
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Well, you know it's Snow White, and the evil Queen is at it again. Will Snow White be saved? Will she fall asleep once again? Will the Prince find her?
# Challenge:
Given an arbitrary number (>= 2) of possibly duplicated hexadecimal color values (ranging from #000000 to #FFFFFF) and paired strings, c... |
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The input is an array (or space-separated string, as you wish), zero-indexed, consisting of one strictly increasing array and one strictly decreasing array (in this order, not other vice versa), each having a length of 2 at least. Example is:
```
-10 -2 4 18 38 46 28 19 10
```
The goal is to write th... |
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**This question already has answers here**:
[Is this number a prime?](/questions/57617/is-this-number-a-prime)
(367 answers)
Closed 8 years ago.
Write a program that tests if a number `n` is prime by checking that none of the integers between `2` and `n-1` (inclusive) divide `n` (you must use ... |
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**Closed**. This question needs [details or clarity](/help/closed-questions). It is not currently accepting answers.
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Closed 9 years ago.
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So you are tasked with creating an open source password authentication system but you want to reveal as little about the implementation of the hash function as possible. Can you write a function that takes in a password string and a salt string and outputs a salted hash string without revealing the h... |
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**Closed**. This question needs [details or clarity](/help/closed-questions). It is not currently accepting answers.
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Closed 6 years ago.
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Closed 7 years ago.
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**This question already has answers here**:
[Translate English to English](/questions/216108/translate-english-to-english)
(9 answers)
Closed 2 years ago.
Inspired by a tweet by [Nathan W. Pyle](https://twitter.com/nathanwpyle/status/1437233812203782145)
There is, now, a standard method of con... |
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**Closed.** This question is [off-topic](/help/closed-questions). It is not currently accepting answers.
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Questions without an **objective primary winning criterion** are off-topic, as they make it impossible to indisputably decide which entry should win.
Closed 3 years ago.
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Closed 7 years ago.
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Closed 8 years ago.
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Closed 9 years ago.
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Counts the number of questions and answers related to Python in the dataset, providing insight into the prevalence of Python content.