func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long n, q;     cin >> n >> q;     long i, j;     int** a = new int*[2];     for (i = 0; i < 2; ++i) {       a[i] = new int[n + 2];       for (j = 0; j < n + 2; j++) {         a[i][j] = 0;       }     }     long res = 0;     long x, y;     while (q--) {       cin >> x >> y;       if (a[x - 1][y] == 0) {         a[x - 1][y] = 1;         for (i = -1; i <= 1; i++) {           if (a[2 - x][y + i] == 1) res++;         }       } else {         a[x - 1][y] = 0;         for (i = -1; i <= 1; i++) {           if (a[2 - x][y + i] == 1) {             res--;           }         }       }       if (res == 0)         cout <<  Yes  << endl;       else         cout <<  No  << endl;     }     return 0;   }   