Codeforces Round #769 (Div. 2)思路分享

#include
using namespace std;
int T,a,b;  
int main()
{
//    freopen("1.in","r",stdin);
    scanf("%d",&T);
    while(T--)
    {
        scanf("%d%d",&a,&b);
        int ans=b-a;
        for(int i=1;i<=ans;++i)
        {
            if(((a+i-1)|b)==b)
            {
                ans=i;
                break;
            }
        }
        for(int i=1;i<=ans;++i)
        {
            if((a|(b+i-1))==b+i-1)
            {
                ans=i;
                break;
            }
        }
        printf("%d\n",ans);
    }
    return 0;
}