func_code_string: #include <bits/stdc++.h>   using namespace std;   bool cmp(int a, int b) { return a > b; }   const int maxen = 1e5 + 5, minn = 1e-5;   string a[1005];   int main() {     int n;     cin >> n;     for (int i = 0; i < n; i++) cin >> a[i];     int res = 0, mn = 13;     for (int i = 0; i < n - 1; i++) {       for (int j = i + 1; j < n; j++) {         string b = a[i];         string c = a[j];         res = 0;         for (int k = 0; k < 6; k++)           if (b[k] != c[k]) res++;         mn = min(mn, res);       }     }     cout << (mn - 1) / 2 << endl;     return 0;   }   