#include<bits/stdc++.h> using namespace std; int x; int n=0; int a[23]; int main() { cin>>x; if(x==0){ cout<<"0"; return 0; } while(x!=0){ int y=x%2; n++; a[n]=y; x/=2; } for(int i=n-1;i>=0;i--){ cout<<a[i]; } return 0; }