#include <iostream>

const int BASE = 2;

void calcBase(int n){
	
	if(n > 0){
		
		if(n/BASE > 0)
			
			calcBase(n/BASE);
		
		std::cout << n % BASE;
	}
	return;
}

int main () {
	
	std::cout << "Input: ";
	
	int value = 0;
	
	std::cin >> value;
	
	calcBase(value);
	
	return 0;
}