#include<bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for (int i = a; i < b; i++)
using ll = long long;

int main(){
    int N;
    cin >> N;
    vector<string> s(N);
    rep(i, 0, N) cin >> s[i];
	int c = 0;
	rep(i, 0, N) {
		rep(j, 0, N) {
			int k = N - 1 - j;
			if(k < j) break;
			if(s[i][j] != s[i][k]) c++;
		}
	}
	string ans = "Yes";
	if(c % 2) ans = "No";
	cout << ans << endl;
}