func_code_string: #include <bits/stdc++.h>   using namespace std;   int t;   long long l, r;   inline void solve() {     cin >> t;     while (t--) {       cin >> l >> r;       long long ans = l;       for (int i = 0; i <= 62; ++i) {         if (ans + (1ll << i) <= r && (ans & (1ll << i)) == 0) {           ans += (1ll << i);         }       }       cout << ans << endl;     }   }   int main() {     solve();     return 0;   }   