#include <iostream> using namespace std; int main() { int a; cin >> a; if (a == 0) { cout << 0; return 0; } int b[32]; int c = 0; while (a > 0) { b[c] = a % 2; a = a / 2; c++; } for (int d = c - 1; d >= 0; d--) { cout << b[d]; } cout << endl; return 0; }