#include<stdio.h>
int main(){

	int n;
	scanf("%d", &n);
	int s[105];
	int cnt = 0;
	while (n) {
		s[cnt] = n % 2;
		n = n / 2;
		cnt++;
	}
	for (int i = cnt - 1; i >= 0; i--) {
		printf("%d", s[i]);
	}
	return 0;
}