HDU 1061

#include <iostream>using namespace std;int main(){int a[10][4]={{0},{1},{6,2,4,8},{1,3,9,7},{6,4},{5},{6},{1,7,9,3},{6,8,4,2},{1,9}};int b,n,num;//while(cin>>n;//{   while(n--)   {   cin>>num;          b=num%10;  if(b==0 || b==1 || b==5 || b==6)  cout<<b<<endl;  else if(b==4 || b==9)  cout<<a[b][num%2]<<endl;  else if(b==2 || b==3 || b==7 || b==8)  cout<<a[b][num%4]<<endl;   }//}return 0;}

找到规律后，直接打表