1
by Alex_Wei @ 2019-11-17 18:46:40
~~CCF：期望50分~~
by VinstaG173 @ 2019-11-17 18:46:59
1个，你还有95
by Alviss_lky @ 2019-11-17 18:47:49
但只有50%限制了n
by gary2005 @ 2019-11-17 18:51:22
和我一样，我没用ULL,1<<63刚好爆，我也在担心有多少n=64
by gary2005 @ 2019-11-17 18:52:03
@[GaryMr](/user/106427) 您没事，您有95pts（数组开小才有这方面风险）
by 今天也要开心a @ 2019-11-17 18:57:17
@[啊哈，小甘蔗](/user/139577) 但1<<63 long long会炸
by gary2005 @ 2019-11-17 18:57:40
@[GaryMr](/user/106427) 但这个只有一个点
by 今天也要开心a @ 2019-11-17 18:58:24
@[啊哈，小甘蔗](/user/139577)
```cpp
/*
Author GaryMr
*/
#include<bits/stdc++.h>
#define rb(a,b,c) for(int a=b;a<=c;++a)
#define rl(a,b,c) for(int a=b;a>=c;--a)
#define PB push_back()
#define LL long long
using namespace std;
int n;
LL k;
void dfs(int len,LL num){
if(len==1){
if(num==1){
printf("0");
}
else{
printf("1");
}
return;
}
LL mid=(LL)(1)<<(len-1);
if(num<=mid){
printf("0");
dfs(len-1,num);
}
else{
printf("1");
dfs(len-1,mid-(num-mid)+1);
}
}
int main(){
// freopen("code.in","r",stdin);
// freopen("code.out","w",stdout);
cin>>n>>k;
k++;
dfs(n,k);
return 0;
}
/*
long long
INF 上界
数组大小
check 内存
No! I64d!
printf->f
scanf->lf
*/
```
考场代码
by gary2005 @ 2019-11-17 18:58:26
mid 那里
by gary2005 @ 2019-11-17 18:58:45