记录编号	595781	评测结果	AAAAAAAAAAAAAAAAAAAA
题目名称	[CSP 2019S]格雷码	最终得分	100
用户昵称	┭┮﹏┭┮	是否通过	通过
代码语言	C++	运行时间	0.058 s
提交时间	2024-10-16 22:04:08	内存使用	3.35 MiB

#include <bits/stdc++.h>
using namespace std;
#define ll unsigned long long
#define pii pair<int,int>
#define fi first
#define in inline
#define se second
#define mp make_pair
#define pb push_back
const int N = 1e5+10;

ll read(){
	ll x = 0,f = 1;char c = getchar();
	for(;c < '0' || c > '9';c = getchar())if(c == '-')f = -1;
	for(;c >= '0' && c <= '9';c = getchar())x = (x<<1) + (x<<3) + c-'0';
	return x * f;
}

__int128 n,k,p[70] = {1};
int main(){
	freopen("2019code.in","r",stdin);
	freopen("2019code.out","w",stdout);
	n = (__int128)read(),k = (__int128)read() + 1;
	for(int i = 1;i <= n;i++)p[i] = p[i-1] * 2;
	for(int i = n;i >= 1;i--)
		if(k > p[i-1])printf("1"),k = p[i] - k + 1;
		else printf("0");
	printf("\n");

	return 0;

}