func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, m, k, s, bigx[11], bigy[11], smlx[11], smly[11];   int main() {     scanf( %d%d%d%d , &n, &m, &k, &s);     for (int i = 1; i <= k; i++)       bigx[i] = bigy[i] = -2020, smlx[i] = smly[i] = 2 * 2020;     for (int i = 0; i < (n); i++)       for (int j = 0; j < (m); j++) {         int t;         scanf( %d , &t);         bigx[t] = max(bigx[t], i + j);         bigy[t] = max(bigy[t], i - j);         smlx[t] = min(smlx[t], i + j);         smly[t] = min(smly[t], i - j);       }     int a, b, ans = -1;     scanf( %d , &a);     for (int i = 1; i < s; i++) {       scanf( %d , &b);       ans = max(ans, max(abs(bigx[a] - smlx[b]), abs(bigx[b] - smlx[a])));       ans = max(ans, max(abs(bigy[a] - smly[b]), abs(bigy[b] - smly[a])));       a = b;     }     printf( %d n , ans);     return 0;   }   