func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long n, g;     cin >> n >> g;     vector<long long> v, ans;     map<long long, long long> m;     map<long long, long long>::iterator it;     for (int i = 0; i < n; i++) {       long long a;       cin >> a;       m[a]++;     }     for (it = m.begin(); it != m.end(); ++it) {       v.push_back(it->second);     }     long long s1 = 0;     for (int i = 0; i < v.size() - 1; i++) {       long long s = 0;       for (int j = i + 1; j < v.size(); j++) {         s += v[j];       }       s1 += s * v[i];     }     cout << s1 << endl;     return 0;   }   