#include <bits/stdc++.h>
using namespace std;
int main()
{
int n;
cin >> n;
for(int i = 0; i < (1<<n); i++) //从0~2^n-1个状态
{
for(int j = 0; j < n; j++) //遍历二进制的每一位
{
if(i & (1 << j))//判断二进制第j位是否存在
{
printf("%d ",j);//如果存在输出第j个元素
}
}
printf("\n");
}
return 0;
}
https://cxk.me/?external_link=http%3A%2F%2Fwww.jinpaibeer.cn%2Fpost%2F11733.html