#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin>>n;
    int x;
    string s;
    while(n!=0)
    {
        x = n%2;
        char c = x + '0';
        n = n / 2;
        s = s+c;
    }
    for(int i = s.size();i>=0;i--)
    {
        cout<<s[i];
    }
}
/**************************************************************
	Problem: 1108
	User: wuyichen
	Language: C++
	Result: Wrong Answer
****************************************************************/