#include <bits/stdc++.h> using namespace std; int main() { int a; int w[1001]; int c = 0; cin >> a; if (a == 0) { cout << a; return 0; } for (int i = 0; a != 0; i++) { w[i] = a % 2; a = a / 2; c++; } for (int i = c - 1 ; i >= 0; i--) { cout << w[i]; } return 0; }