func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     while (t--) {       long long n, sum = 0;       cin >> n;       string arr;       string brr;       cin >> arr >> brr;       for (int i = 0; i < n; i++) {         if (brr[i] ==  0 ) {           continue;         }         if (arr[i] ==  0 ) {           sum++;           arr[i] =  2 ;           continue;         }         if (i == 0 && arr[1] ==  1 ) {           sum++;           arr[1] =  2 ;           continue;         }         if (i == 0 && arr[1] !=  1 ) {           continue;         }         if (arr[i - 1] ==  1 ) {           sum++;           arr[i - 1] =  2 ;           continue;         }         if (i == n - 1) {           break;         }         if (arr[i + 1] ==  1 ) {           sum++;           arr[i + 1] =  2 ;         }       }       cout << sum << endl;     }     return 0;   }   