func_code_string: #include <bits/stdc++.h>   using namespace std;   bool r[100010], c[100010];   int main() {     ios_base::sync_with_stdio(false);     long long n, m, a, b, li, co;     cin >> n >> m;     li = co = 0;     long long ans;     for (int i = 0; i < m; i++) {       cin >> a >> b;       if (r[a] == false) {         r[a] = true;         li++;       }       if (c[b] == false) {         c[b] = true;         co++;       }       ans = n * n - co * n;       ans = ans - li * (n - co);       if (i > 0) cout <<    ;       cout << ans;     }     cout << endl;     return 0;   }   