#include<bits/stdc++.h> using namespace std; int y[100]; int cum = 0; int main(){ int a; cin >> a; if(a == 0){ cout << "0"; return 0; } while(a != 0){ int yu = a%2; y[cum] = yu; cum++; a = a/2; } for(int i = cum-1;i >= 0;i--){ cout << y[i]; } return 0; }