func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     string s;     cin >> s;     int n = s.size();     int l[n];     for (int i = 0; i < n; ++i) {       l[i] = n;     }     for (int i = 0; i < n; ++i) {       for (int j = 1; j <= min(n - i - 1, i); ++j) {         if (s[i - j] == s[i] && s[i] == s[i + j]) {           l[i - j] = min(l[i - j], i + j);           break;         }       }     }     set<pair<int, int> > h;     for (int i = 0; i < n; ++i) {       h.insert({l[i], i});     }     long long sum = 0;     for (int i = 0; i < n; ++i) {       sum += n - ((*h.begin()).first);       h.erase({l[i], i});     }     cout << sum;     return 0;   }   