N = int(input())
A = []
black = 0
white = 0
for _ in range(N):
    s = input()
    b = s.count('#')
    black += b
    white += N - b
    A.append(s)


def solve():
    if N % 2 == 0:
        if black % 2 == 1: return False
        if white % 2 == 1: return False
        return True

    return True


if solve():
    print('Yes')
else:
    print('No')