func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 1e6 + 50;   long long kol, sum, id, ans;   string s;   vector<long long> a;   int main() {     cin >> s;     ans = 0;     sum = 0;     for (int i = 0; i < s.size(); i++) {       if (s[i] ==  v ) {         id += 1;         if (i == s.size() - 1) {           sum += id - 1;         }       } else {         if (id != 0) {           sum += id - 1;           id = 0;         }         a.push_back(sum);         kol += 1;       }     }     if (a.size() == 0) {       cout << 0;       return 0;     }     for (int i = 0; i < a.size(); i++) {       ans += a[i] * (sum - a[i]);     }     cout << ans;     return 0;   }   