func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int c = 0;     long long t = 0;     string s, s2;     cin >> s >> s2;     int n = s2.size() - s.size();     for (int i = 0; i < n; i++) {       c += s2[i] -  0 ;     }     for (int i = 0; i < s.size(); i++) {       c += s2[i + n] -  0 ;       if (i) c -= s2[i - 1] -  0 ;       if (s[i] ==  0 )         t += c;       else         t += n - c + 1;     }     cout << t;     return 0;   }   