func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     string s, provera;     int p = -1, d = -1, brojac = 0;     bool flag = false;     cin >> s >> provera;     for (int i = 0; i < provera.length(); ++i) {       if (provera[i] == s[brojac]) {         brojac++;       }       if (brojac == s.length()) {         p = i;         brojac--;         break;       }     }     for (int i = provera.length() - 1; i >= 0; --i) {       if (provera[i] == s[brojac]) brojac--;       if (brojac < 0) {         d = i;         break;       }     }     if ((d - p) > 0)       cout << d - p << endl;     else       cout << 0 << endl;     return 0;   }   