#include<stdio.h>
#include<string.h>

#define maxn 10001

const int mod[20]={1,1,2,6,4,2,2,4,2,8,4,4,8,4,6,8,8,6,8,2};

int lastdigit(char buf[])
{
	int len=strlen(buf),a[maxn],i,c,ret=1;
	if(len==1)return mod[buf[0]-'0'];
	for(i=0;i<len;i++)
		a[i]=buf[len-1-i]-'0';
	while(len)
	{
		ret=ret*mod[a[1]%2*10+a[0]]%5;
		for(c=0,i=len-1;i>=0;i--)
		{
			c=c*10+a[i],a[i]=c/5,c%=5;
		}
		len-=!a[len-1];
	}
	return ret+ret%2*5;
}

int main()
{
	char  n[maxn];
	while(scanf("%s",n)!=EOF)
	{
		printf("%d\n",lastdigit(n));
	}
	return 0;
}