func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MOD(1000000007);   const int INF((1 << 30) - 1);   const int MAXN(30);   string a[MAXN];   int type[200] = {0};   int main() {     int n, m, x;     scanf( %d%d%d , &n, &m, &x);     for (int i = 0; i < n; i++) cin >> a[i];     for (int i =  A ; i <=  Z ; i++) type[i] = INF;     for (int i =  a ; i <=  z ; i++) type[i] = INF;     for (int i = 0; i < n; i++)       for (int j = 0; j < m; j++) {         if (a[i][j] !=  S )           type[a[i][j]] = 1;         else {           for (int k = 0; k < n; k++)             for (int l = 0; l < m; l++)               if (a[k][l] !=  S )                 type[a[k][l] -  a  +  A ] =                     min(type[a[k][l] -  a  +  A ],                         (i - k) * (i - k) + (j - l) * (j - l));         }       }     int q;     scanf( %d , &q);     int ans = 0;     while (q--) {       char c;       scanf(  %c , &c);       if (type[c] == INF) {         printf( -1 );         return 0;       } else if (c >=  A  && c <=  Z  && type[c] > x * x)         ans++;     }     printf( %d , ans);   }   