#include <iostream>
#include <vector>
#include <cmath>
#define ull unsigned long long
using namespace std;

int n;
ull k;

int main(){
    cin >> n >> k;
    ull d = pow(2, n - 1);
    while(n){
        if(k < d){
            cout << 0;
        }
        else{
            cout << 1;
            k = d * 2 - k - 1;
        }
        n --;
        d = pow(2, n - 1);
    }
    return 0;
}

尚未完全明白