func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     string s;     cin >> s;     bool f = 0;     long last = -1, c = 0;     long ans = 0;     for (register int i = 0; i < s.length(); i++) {       if (s[i] ==  F ) {         if (last == -1) {           last = i;         } else {           last = max(i - c, (last == 0) ? 0 : last + 1);         }         ans = max(ans, last);         c++;       }     }     cout << ans << endl;     return 0;   }   