#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,k=0,a[1000]; 
    cin>>n;
    while(n!=0){
    	a[k]=n%2;
    	n=n/2;	
    	k++;
    }
    for(int i=k-1;i>=0;i--){
    	cout<<a[i];
    }
	return 0;
}

/**************************************************************
	Problem: 1108
	User: chenlingxuan
	Language: C++
	Result: Wrong Answer
****************************************************************/