a=int(input())
ans=0
if a%2==0: #偶数の時
  for i in range(a):
    s=input()
    for m in range(a//2):
      if s[m]!=s[a-1-m]:
        ans+=1
else: #奇数の時
  for i in range(a):
    s=input()
    for m in range((a-1)//2):
      if s[m]!=s[a-1-m]:
        ans+=1
if ans%2==0:
  print("Yes")
else:
  print("No")