func_code_string: #include <bits/stdc++.h>   using namespace std;   using ll = long long;   using ull = unsigned long long;   using vi = vector<int>;   using ii = pair<int, int>;   using vii = vector<pair<int, int>>;   void solve() {     int n;     cin >> n;     int r = 0;     for (int i = 0; i < n; ++i) {       for (int j = 0; j < n; ++j) {         int x;         cin >> x;         if (i == j) r += x;       }     }     r %= 2;     string res;     int q;     cin >> q;     while (q--) {       int t;       cin >> t;       if (t == 3)         res += to_string(r);       else if (t == 1 || t == 2) {         int waste;         cin >> waste;         r ^= 1;       }     }     cout << res <<   n ;   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     int tc = 1;     while (tc--) solve();   }   