#include <stdio.h>

int main()
{
	char buf[32+1];
	unsigned u;
	int n = 0;

	scanf("%u", &u);
	if (u == 0) {
		printf("0\n");
		return 0;
	}

	while (u) {
		buf[n++] = '0' + (u & 1);
		u >>= 1;
	}

	while (0 < n) {
		printf("%c", buf[--n]);
	}
	printf("\n");
	return 0;
}