func_code_string: #include <bits/stdc++.h>   using namespace std;   int st[200005];   int main() {     int tam1, tam2, i;     string s, t;     cin >> s >> t;     long long r = 0;     tam1 = s.size();     tam2 = t.size();     st[0] = 0;     for (i = 0; i < tam2; i++) {       st[i + 1] = st[i] + (t[i] -  0 );     }     for (i = 0; i < tam1; i++) {       if (s[i] ==  0 ) {         r += (st[tam2 - tam1 + i + 1] - st[i]);       } else {         r += (tam2 - tam1 + 1 - (st[tam2 - tam1 + i + 1] - st[i]));       }     }     cout << r << endl;     return 0;   }   