func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAX = 2e5 + 3;   string s, p;   int F[MAX][2];   void solve() {     cin >> s >> p;     F[0][0] = F[0][1] = 0;     for (int i = 1; i <= p.size(); ++i) {       for (int j = 0; j < 2; ++j) {         F[i][j] = F[i - 1][j];       }       ++F[i][p[i - 1] -  0 ];     }     long long int ans = 0;     for (int i = 0; i < s.size(); ++i) {       int c = s[i] -  0 ;       for (int j = 0; j < 2; ++j) {         ans += abs(c - j) * (F[p.size() - s.size() + i + 1][j] - F[i][j]);       }     }     cout << ans <<   n ;   }   int main() {     ios_base::sync_with_stdio(false);     solve();     return 0;   }   