1 /* 2     PROBLEM:CF 485C 3     AUTHER:Nicole 4     MEMO:位运算 二进制 5 */ 6 #include<cstdio> 7 int main() 8 { 9     int n;10     scanf("%d",&n);11     for (int i=1;i<=n;i++)12     {13         long long l,r;14         scanf("%lld%lld",&l,&r);15         long long x=1;16         while (l<=r)17         {18             long long temp=l|x;19             if (temp>r) break;20             l=temp;21             x=x<<1;22         }23         printf("%lld\n",l);24     }25     return 0;26 }