func_code_string: #include <bits/stdc++.h>   using namespace std;   string s;   int main() {     long long n, q, x, y;     cin >> n >> q;     for (long long i = 1; i <= q; i++) {       cin >> x >> y;       if ((x + y) % 2 == 0) {         if (n % 2 == 0) {           long long linie = n / 2;           long long first = linie * (x - 1);           long long kth = (y + 1) / 2;           cout << first + kth <<   n ;         } else {           long long linie = n / 2;           long long lines = linie * (x - 1) + (x - 1) / 2 + (x - 1) % 2;           long long kth = (y + 1) / 2;           cout << lines + kth <<   n ;         }       } else {         long long depl = (n * n) / 2 + (n * n) % 2;         if (n % 2 == 0) {           long long linie = n / 2;           long long first = linie * (x - 1);           long long kth = (y + 1) / 2;           cout << depl + first + kth <<   n ;         } else {           long long linie = n / 2;           long long lines = linie * (x - 1) + (x - 1) / 2;           long long kth = (y + 1) / 2;           cout << depl + lines + kth <<   n ;         }       }     }     return 0;   }   