func_code_string: #include <bits/stdc++.h>   using namespace std;   int firstOne(string s) {     int len = s.length();     for (int i = len - 1; i >= 0; i--) {       if (s[i] ==  1 ) {         return len - i;       }     }   }   int firstOneAfter(string s, int idx) {     int len = s.length();     for (int i = len - idx; i >= 0; i--) {       if (s[i] ==  1 ) {         return len - i;       }     }   }   int main() {     int t;     cin >> t;     while (t--) {       string x, y;       cin >> x >> y;       int firstOneX = firstOne(x), firstOneY = firstOne(y);       if (firstOneX >= firstOneY) {         cout << firstOneX - firstOneY << endl;       } else {         cout << firstOneAfter(x, firstOneY) - firstOneY << endl;       }     }     return 0;   }   