func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 1e6 + 5;   string A, B;   int a[N], b[N];   int main() {     while (cin >> A >> B) {       int len1 = A.size(), len2 = B.size();       for (int i = 0; i <= len1 - 1; i++) a[i] = A[i] -  0 ;       for (int i = 0; i <= len2 - 1; i++) b[i] = B[i] -  0 ;       int sum = 0;       for (int i = 0; i <= len2 - 1; i++) sum ^= (a[i] ^ b[i]);       int ans = sum == 0;       for (int i = 1; i <= len1 - len2; i++) {         sum ^= a[i - 1];         sum ^= a[i - 1 + len2];         ans += sum == 0;       }       printf( %d n , ans);     }     return 0;   }   