#include <stdio.h>

void trans(int a, int b)
{
	if(a == 0) return;
	int res = a % b;
	printf("%d",res);
	trans(a / b, b);
}

int main()
{
	int n;
	scanf("%d",&n);
	
	if(n == 0) printf("0\n");
	else trans(n,2);
	
	return 0;
}