func_code_string: #include <bits/stdc++.h>   using namespace std;   long long read() {     long long x = 0, f = 0;     char ch = getchar();     while (!isdigit(ch)) f = ch ==  - , ch = getchar();     while (isdigit(ch)) x = (x << 1) + (x << 3) + (ch ^ 48), ch = getchar();     return f ? -x : x;   }   const int N = 1005;   int n, k, b;   long long a[N][N], c[N][N];   int x[N], y[N];   int main() {     k = read(), b = 1 << k;     for (int i = (0); i <= (b - 1); i++)       for (int j = (0); j <= (b - 1); j++) a[i][j] = read();     n = read();     for (int i = (1); i <= (n); i++) x[i] = read(), y[i] = read();     for (int d = (0); d <= (k - 1); d++) {       memset(c, 0, sizeof(c));       for (int i = (0); i <= (b - 1); i++)         for (int j = (0); j <= (b - 1); j++)           for (int t = (1); t <= (n); t++)             c[(i + (x[t] << d)) & (b - 1)][(j + (y[t] << d)) & (b - 1)] ^=                 a[i][j];       swap(a, c);     }     int c = 0;     for (int i = (0); i <= (b - 1); i++)       for (int j = (0); j <= (b - 1); j++)         if (a[i][j]) c++;     cout << c << endl;     return 0;   }   