n=int(input())
a=[input()for _ in range(n)]
if n%2:
  exit(print('Yes'))
ans=0
for i in range(n):
  for j in range(n//2):
    if a[i][j]!=a[i][n-1-j]:
      ans+=1
if ans%2:
  print('No')
else:
  print('Yes')