func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long int n, r, avg, m, k, t, x, y, i, j, b, d, MOD = 1073741824,                                                         count = 0, ans = 0;     string s;     cin >> s;     long long int a[36] = {0};     for (i = 0; i < s.size(); i++) {       if (s[i] -  a  >= 0) {         a[s[i] -  a  + 10]++;       } else {         x = s[i] - 48;         a[x]++;       }     }     for (i = 0; i < 36; i++) {       count += pow(a[i], 2);     }     cout << count;     return 0;   }   