func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     long long int n, m;     long long int b = 1;     while (t--) {       cin >> m >> n;       while (true) {         if ((m | b) <= n)           m = m | b;         else           break;         b <<= 1;       }       cout << m <<   n ;       b = 1;     }   }   