@[Unaccepted_zero](/user/242619)
改cin然后过了
by Charser茶色 @ 2019-11-20 22:04:50
@[Charser茶色](/user/148184) cin就耗时长，其他的很靠谱
by GalilAR @ 2019-11-20 22:11:29
@[Charser茶色](/user/148184) ull是用%llu的
by minstdfx @ 2019-11-20 22:25:18
@[Unaccepted_zero](/user/242619) 你在误人子弟吗。。。？哪里来的大写LLd
by ZYyboT @ 2019-11-20 22:54:38
```
scanf("%d%llu",&n,&k);
```
by Yuanchenpu @ 2019-11-20 23:07:13
@[Unaccepted_zero](/user/242619)
突然发现还没过，最后一个点不行
代码：
```cpp
#include<cmath>
#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
using namespace std;
unsigned long long pand(int n){
unsigned long long sum=1;
for(int i=1;i<n;i++)
sum*=2;
return sum;
}
void dfs(int n,unsigned long long k){
if(n==0) return;
unsigned long long x=pand(n);
if(k>x)
{
printf("1");
dfs(n-1,x-k+1+x);
}
else
{
printf("0");
dfs(n-1,k);
}
}
int main(){
int n;
unsigned long long k;
scanf("%d%llu",&n,&k);
dfs(n,k+1);
return 0;
}
```
by Charser茶色 @ 2019-11-21 20:38:02