#include <bits/stdc++.h>   using namespace std;   int a[102][102][102] = {};   int main() {     string s;     int n, m, k;     cin >> n >> m >> k;     for (int i = 1; i < n + 1; ++i) {       for (int j = 1; j < m + 1; ++j) {         cin >> s;         for (int t = 1; t < k + 1; ++t) a[i][j][t] = s[t - 1] -  0 ;       }     }     int ans = 0;     for (int i = 1; i < n + 1; ++i)       for (int j = 1; j < m + 1; ++j)         for (int t = 1; t < k + 1; ++t)           if (a[i][j][t] &&               ((a[i][j][t - 1] &&                 (a[i][j][t + 1] || (a[i][j + 1][t] && !a[i][j + 1][t - 1]) ||                  (a[i + 1][j][t] && !a[i + 1][j][t - 1]))) ||                (a[i][j - 1][t] &&                 (a[i][j + 1][t] || (a[i][j][t + 1] && !a[i][j - 1][t + 1]) ||                  (a[i + 1][j][t] && !a[i + 1][j - 1][t]))) ||                (a[i - 1][j][t] &&                 (a[i + 1][j][t] || (a[i][j][t + 1] && !a[i - 1][j][t + 1]) ||                  (a[i][j + 1][t] && !a[i - 1][j + 1][t])))))             ++ans;     cout << ans;     return 0;   }   