func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);     int tc;     cin >> tc;     while (tc--) {       long long l, r;       cin >> l >> r;       long long i = 1;       while ((l | i) <= r) {         l |= i;         i <<= 1;       }       cout << l <<   n ;     }   }   