#include<stdio.h>
int main()
{
	int n;
	scanf("%d", &n);
	int ans[102], l = 0;
	while (n > 0)
	{
		ans[l] = n % 7;
		n /= 7;
		l++;
	}
	if (l == 0)
		printf("0");
	while (l > 0)
	{
		l--;
		printf("%d", ans[l]);
	}
	printf("\n");
	return 0;
}