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

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