#include<bits/stdc++.h>
using namespace std;
#define int long long
int a,b,c,ans=1,cnt=1;
signed main()
{
	cin>>a>>b>>c;
	c%=4;
	if(c==0)c=4;
	for(int i=0;i<c;i++)cnt=b*cnt%4;
	if(cnt==0)cnt=4;
	a%=10;
	for(int i=0;i<cnt;i++)ans*=a;
	ans%=10;
	cout<<ans<<'\n';
	return 0;
}