codeingame/triforce.py

'''
> https://www.codingame.com/ide/puzzle/may-the-triforce-be-with-you
@author: olivier.massot, 2019
'''
n = int(input())

lines = '\n'.join([' ' * (2 * n - i - 1) + \
         '*' * ((1 + 2 * i) % (2*n)) + \
         ' ' * ((1 + (2 * (2 * n - (i + 1)))) if i >= n else 0)  + \
         '*' * (((1 + 2 * i) % (2*n)) if i >= n else 0) \
         for i in range(2 * n)])

print('.' + lines[1:])