func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long L, R;     int n;     cin >> n;     while (n--) {       cin >> L >> R;       for (long long k = 0; k <= 60; ++k) {         if ((1LL << k) & (L)) {           continue;         } else {           if ((1LL << k) + L <= R) {             L += (1LL << k);           } else {             break;           }         }       }       cout << L <<   n ;     }     return 0;   }   