#include<bits/stdc++.h>
using namespace std;
#define int long long
const int N=2e6+100;
int n,k;
int x,y,z;
inline int calc(int x){
	return (x+1)*x;
}
int work(int a,int b,int d){
	if((-b+d)%(2*a)!=0)return -1;
	if((-b-d)%(2*a)!=0)return -1;
	if(min((-b+d)/(2*a),(-b-d)/(2*a))<0)return -1;
	return max((-b+d)/(2*a),(-b-d)/(2*a));
}
signed main(){
//	freopen("A.in","r",stdin);
//	freopen("B.out","w",stdout);
	cin>>n>>k;
	int f=0;
	for(int i=n;i>=0;i--){
		int w=n-i;
		int c=2*k-calc(i);
		c=-c+w*w-w;
		int a=2,b=-(2*w);
		int deta=(b*b-4*a*c);
	//	cout<<a<<" "<<b<<" "<<deta<<" "<<c<<endl;
		if(deta<0)continue;
		int d=sqrt(deta);
		if(d*d!=deta)continue;
		int x1=work(2,b,d);
		if(x1<0)continue;
		x=i,y=x1;
		f=1;
		break;
	}
	if(x==0&&!f){
		puts("-1");
		return 0;
	}
//	cout<<x<<" "<<y<<endl;
	for(int i=1;i<=n;i++){
		if(i==x+1||i==x+y+1)printf("1 ");
		else printf("0 ");
	}
}