func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long left;     long long right;     scanf( %lld%lld , &left, &right);     long long ans = 0LL;     for (int i = (62); i >= (0); --i) {       long long bitLeft = left & (1LL << i);       long long bitRight = right & (1LL << i);       if (bitRight && !bitLeft) {         ans = (1LL << (i + 1)) - 1LL;         printf( %lld n , ans);         return 0;       }     }     printf( %lld n , ans);     return 0;   }   