#include<bits/stdc++.h>
using namespace std;
int main() {
int n;
    bool s;
    cin >> n;
    vector <vector<int> > a (n);
    for (int i = 0; i < n; i++) {
            a[i].resize(n);
        for (int j = 0; j < n; j++) {
            cin >> a[i][j];
        }
    }
    s = true;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            if (a[i][j] != a[j][i]) s = false;
        }
    }
    if (s) cout << "yes";
    else cout << "no";
    return 0;
}