N = int(input())

A = [ list(input()) for i in range(N) ]

B = 0
W = 0

for i in range(N):
    for j in range(N):
        if A[i][j] == "#":
            B += 1
        else:
            W += 1

if N%2 == 1:
    print ("Yes")
elif B % 2 == 1:
    print ("No")
else:
    print ("Yes")