func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int t;     cin >> t;     while (t--) {       int n;       cin >> n;       string s;       getline(cin >> ws, s);       string one =  1 , two =  1 ;       int prevOne = 1, prevTwo = 1;       for (int i = 1; i < n; i++) {         int num = s[i] -  0 ;         if (prevOne == prevTwo) {           if (num == 2) {             one +=  1 ;             two +=  1 ;             prevOne = 1;             prevTwo = 1;           } else if (num == 1) {             one +=  1 ;             two +=  0 ;             prevOne = 1;             prevTwo = 0;           } else {             one +=  0 ;             two +=  0 ;             prevOne =  0 ;             prevTwo =  0 ;           }         } else {           for (int j = i; j < n; j++) {             one +=  0 ;             two += s[j];           }           break;         }       }       cout << one <<   n  << two <<   n ;     }   }   