func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MOD = 1000000007;   struct Sync_stdio {     Sync_stdio() {       cin.tie(NULL);       ios_base::sync_with_stdio(false);     }   } _sync_stdio;   int main() {     int n, m, k;     cin >> n >> m >> k;     vector<vector<vector<int>>> v(n + 2,                                   vector<vector<int>>(m + 2, vector<int>(k + 2)));     vector<vector<vector<int>>> ans(         n + 2, vector<vector<int>>(m + 2, vector<int>(k + 2)));     for (int i = (0); i < (n); ++i) {       for (int j = (0); j < (m); ++j) {         string s;         cin >> s;         for (int l = (0); l < (k); ++l) {           v[i + 1][j + 1][l + 1] = s[l] -  0 ;         }       }     }     for (int i = (1); i < (n + 1); ++i) {       for (int j = (1); j < (m + 1); ++j) {         for (int l = (1); l < (k + 1); ++l) {           if (v[i][j][l] == 1 && v[i - 1][j][l] == 1 && v[i + 1][j][l] == 1) {             ans[i][j][l] = 1;           }           if (v[i][j][l] == 1 && v[i][j - 1][l] == 1 && v[i][j + 1][l] == 1) {             ans[i][j][l] = 1;           }           if (v[i][j][l] == 1 && v[i][j][l - 1] == 1 && v[i][j][l + 1] == 1) {             ans[i][j][l] = 1;           }           for (int x1 = (0); x1 < (3); ++x1) {             for (int x2 = (0); x2 < (3); ++x2) {               if (x1 == x2) {                 continue;               }               vector<int> dx1(3);               vector<int> dx2(3);               ++dx1[x1];               ++dx2[x2];               if (v[i][j][l] == 1 && v[i - dx1[0]][j - dx1[1]][l - dx1[2]] == 1 &&                   v[i + dx2[0]][j + dx2[1]][l + dx2[2]] == 1 &&                   v[i - dx1[0] + dx2[0]][j - dx1[1] + dx2[1]]                    [l - dx1[2] + dx2[2]] == 0) {                 ans[i][j][l] = 1;               }             }           }         }       }     }     int res = 0;     for (int i = (1); i < (n + 1); ++i) {       for (int j = (1); j < (m + 1); ++j) {         for (int l = (1); l < (k + 1); ++l) {           res += ans[i][j][l];         }       }     }     cout << res;   }   