杭电oj1097

#include<iostream>
using namespace std;
int main()
{
 
 int two[4]={6,2,4,8};
 int three[4]={1,3,9,7};
 int four[2]={6,4};
 int seven[4]={1,7,9,3};
 int eight[4]={6,8,4,2};
 int nine[2]={1,9};
 int a,b;
 while(cin>>a>>b)
 {
  a=a%10;
  if(a==0||a==1||a==5||a==6)
  cout<<a<<endl;
  if(a==2)
  cout<<two[b%4]<<endl;
  if(a==3)
  cout<<three[b%4]<<endl;
  if(a==4)
  cout<<four[b%2]<<endl;
  if(a==7)
  cout<<seven[b%4]<<endl;
  if(a==8)
  cout<<eight[b%4]<<endl;
  if(a==9)
  cout<<nine[b%2]<<endl;
 }
 return 0;
}