func_code_string: #include <bits/stdc++.h>   const int maxn = 1e6 + 10;   using namespace std;   int pre[maxn];   int main() {     string a, b;     cin >> a;     cin >> b;     int LA = a.size();     int LB = b.size();     int flag = 0, ans = 0;     for (int i = 0; i < LB; i++) {       if (b[i] ==  1 ) flag++;     }     flag %= 2;     if (a[0] ==  1 ) pre[1] = 1;     for (int i = 1; i < LA; i++) {       if (a[i] ==  1 )         pre[i + 1] = pre[i] + 1;       else         pre[i + 1] = pre[i];     }     int T = LA - LB;     for (int i = 0; i <= T; i++) {       if ((pre[i + LB] - pre[i]) % 2 == flag) {         ans++;       }     }     cout << ans << endl;     return 0;   }   