#  Program to Print the Pant's Shape Star Pattern 

row_size=int(input("Enter the row size:"))
print_control_x=row_size
print_control_y=row_size
for out in range(1,row_size+1):
    for inn in range(1,row_size*2):
        if inn>print_control_x and inn<print_control_y:
            print(" ",end="")
        else:
            print("*", end="")
    print_control_x-=1
    print_control_y+=1
    print("\r")