hdu1093

//a^b循环节为4

#include <iostream>#include <cmath>using namespace std;int cal(int a,int b){    a = a%10;    if( b >= 1 && b <= 4)      return ((int)pow((float)a,(float)b))%10;    else if(b > 4)        return cal(a,b%4);    else if(b == 0)         return cal(a,4);}int A,B;int main(){    while(cin>>A>>B)    {        cout<<cal(A,B)<<endl;    }    return 0;}