#include <iostream>
#include <vector>
using namespace std;

typedef vector< vector<int> > Matrix;
bool is_symmetric(const Matrix& m) {
    for (int i = 1; i < m.size()-1; i++) {
        for (int j = 0; j < i; ++j) {

            if (not m[i][j] == m[j][i]) return false;
        }
    }
    return true;
}

int main() {
    Matrix m = {{}};
    cout << is_symmetric(m) << endl;

}