func_code_string: #include <bits/stdc++.h>   using namespace std;   char c[110][110][110];   bool a[110][110][110];   bool b[110][110][110];   int main() {     int n, m, k;     cin >> n >> m >> k;     for (int i = 0; i < n; i++)       for (int j = 0; j < m; j++) scanf( %s , c[i][j]);     for (int i = 0; i < n; i++)       for (int j = 0; j < m; j++)         for (int s = 0; s < k; s++)           if (c[i][j][s] ==  1 ) a[i + 1][j + 1][s + 1] = true;     int di[3] = {1, 0, 0};     int dj[3] = {0, 1, 0};     int ds[3] = {0, 0, 1};     for (int i = 1; i <= n; i++)       for (int j = 1; j <= m; j++)         for (int s = 1; s <= k; s++) {           if (!a[i][j][s]) continue;           for (int p = 0; p < 3; p++) {             if (a[i + di[p]][j + dj[p]][s + ds[p]] &&                 a[i - di[p]][j - dj[p]][s - ds[p]]) {               b[i][j][s] = true;             }           }           for (int p = 0; p < 3; p++)             for (int l = 0; l < 3; l++)               if (a[i - di[p]][j - dj[p]][s - ds[p]] &&                   a[i + di[l]][j + dj[l]][s + ds[l]] &&                   !a[i - di[p] + di[l]][j - dj[p] + dj[l]][s - ds[p] + ds[l]]) {                 b[i][j][s] = true;               }         }     int answ = 0;     for (int i = 1; i <= n; i++) {       for (int j = 1; j <= m; j++) {         for (int s = 1; s <= k; s++) {           if (b[i][j][s]) answ++;         }       }     }     cout << answ << endl;     return 0;   }   