ACdream OJ 1020 The Game about KILL

嗯。。。尝试了一些新姿势，娱乐一下

#include <bits/stdc++.h>using namespace std;int main(){    int n;    while(~scanf("%d",&n)){        printf("%d\n",((1<<31-__builtin_clz(n))^n)<<1|1);    }    return 0;}