#include<bits/stdc++.h> using namespace std; int y[32]; int cnt = 0; int main() { int n; cin >> n; while (1) { int yu = n % 2; y[cnt] = yu; cnt++; n = n / 2; if (n == 0) { break; } } for (int i = cnt - 1; i >= 0; i--) { cout << y[i]; } return 0; }