#include <iostream>

using namespace std;

int main(){
    int n;
    cin >> n;
    int a[100][100];
    for (int i = 0; i < n; i++){
        for (int j = 0; j < n; j++)
            cin >> a[i][j];
            cout << endl;
            }
            for(int i = 0; i < n - 1; i++)
                for(int j = i + 1; j < n; j++)
            if(a[i][j] != a[j][i]){
                cout << "NO" << endl;
            }
            else
                cout << "YES" << endl;
            return 0;

}