func_code_string: #include <bits/stdc++.h>   using namespace std;   long long int det(long long int a, long long int b, int bit) {     if (!bit) {       if (a & 1) return a;       if (b & 1) return b;       return a;     }     if (a & (1ll << bit)) return det(a, b, bit - 1);     if (!(b & (1ll << bit))) return det(a, b, bit - 1);     if ((b & ((1ll << (bit + 1)) - 1)) == ((1ll << (bit + 1)) - 1)) return b;     return ((a & (~((1ll << bit) - 1))) | ((1ll << bit) - 1));   }   int main() {     int n = 0;     cin >> n;     long long int a = 0, b = 0;     while (n--) {       cin >> a >> b;       cout << det(a, b, 60) <<   n ;     }     return 0;   }   