#include<bits/stdc++.h> using namespace std; int main(){ int n,l=0; int a[3]; cin>>n; for(int i=1;i<=n;i++){ a[l++]=n%2; n=n/2; } a[l++]=n%2; for(int i=l-1;i>=0;i--){ cout<<a[i]; } return 0; }