#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,a[10000]={0},k=0;
    cin>>n;
    if(n==0){
    	cout<<'0';
    }
    while(n!=0){
    	a[k++]=n%2;
    	n/=2;
    }
    for(int i=k-1;i>=0;i--){
    	cout<<a[i];
    }
	return 0;
}
/**************************************************************
	Problem: 1108
	User: panyuchen
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2072 kb
****************************************************************/