func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, a[1005][1005], q, opr, xi;   int row_sum[1005], col_sum[1005], total_row_add, total_col_add;   int main() {     scanf( %d , &n);     for (int i = 0; i < n; i++)       for (int j = 0; j < n; j++) scanf( %d , &a[i][j]);     for (int i = 0; i < n; i++)       for (int j = 0; j < n; j++)         if (i != j) {           row_sum[i] = (row_sum[i] + a[i][j]) % 2;           col_sum[j] = (col_sum[j] + a[i][j]) % 2;         }     int ans = 0;     for (int i = 0; i < n; i++)       for (int j = 0; j < n; j++) {         if (i == j)           ans = (ans + a[i][j] * a[i][j]) % 2;         else           ans = (ans + a[i][j] * a[j][i]) % 2;       }     scanf( %d , &q);     while (q--) {       scanf( %d , &opr);       if (opr == 1) {         scanf( %d , &xi);         xi--;         ans ^= 1;         row_sum[xi] += n - 1;         row_sum[xi] %= 2;         ans = (ans + 2 * (col_sum[xi] + total_col_add)) % 2;         col_sum[xi] = (col_sum[xi] + 1) % 2;         total_col_add = (total_col_add + 1) % 2;       } else if (opr == 2) {         scanf( %d , &xi);         xi--;         ans ^= 1;         col_sum[xi] += n - 1;         col_sum[xi] %= 2;         ans = (ans + 2 * (row_sum[xi] + total_row_add)) % 2;         row_sum[xi] = (row_sum[xi] + 1) % 2;         total_row_add = (total_row_add + 1) % 2;       } else {         printf( %d , ans);       }     }     printf(  n );     return 0;   }   