hdu 1063 Exponentiation

http://acm.hdu.edu.cn/showproblem.php?pid=1063

 1 import java.math.BigDecimal;

 2 import java.util.*;

 3 public class Main {

 4     public static void main(String []args)

 5     {

 6         Scanner cin=new Scanner(System.in);

 7         BigDecimal r,mutil;

 8         String ans;

 9         int n;

10         while(cin.hasNextBigDecimal())

11         {

12             r=cin.nextBigDecimal();

13             n=cin.nextInt();

14             mutil=r.pow(n);//乘方

15             mutil=mutil.stripTrailingZeros();//去掉后导零

16             ans=mutil.toPlainString();

17             if(ans.indexOf(‘0‘)==0)

18             {

19                 ans=ans.substring(1);//小于零去掉零

20             }

21             System.out.println(ans);

22         }

23     }

24

25 }

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