> import java.io.*;
> import java.util.*;
> import java.math.*;
> 
> class Exponentiation
> {
>     public static void main(String[] args) throws Exception
>     {
>         BufferedReader stdin = new BufferedReader(
>             new InputStreamReader(System.in));
>         
>         String line;
>         
>         while ((line = stdin.readLine()) != null) 
>         {   
> 	        StringTokenizer st = new StringTokenizer(line);
> 	        BigDecimal v = new BigDecimal(st.nextToken());
> 	        BigDecimal res = new BigDecimal("1");
> 	        int n = Integer.parseInt(st.nextToken());
> 	        
> 	        while (n > 0) 
> 	        {
> 	        	res = res.multiply(v);
> 	        	n--;
> 	        }    
> 	        
> 	        print(res.toString());
> 	         
>         }
>     }
>     private static void print(String s) throws Exception
>     {
>     	int begin, e,end;
>     	begin = 0;
>         end = s.length();
>         e = end;
>         
>         while ((e > 0) && (s.charAt(e - 1) != 'E') )
>         {
>         	e--;
>         }
>         
>         
>         while ((end > 0) && (s.charAt(end - 1) == '0')) 
>         {
>         	end--;
>         }
>         if (e == 0)
>         {
>         	System.out.println(s.substring(0, end));
>         }
>         else
>         {
>         	int en = Integer.parseInt(s.substring(e+1, s.length()));
>         	String ps = ".";
>         	int j = en;
>         	while ((--j) >0)
>         	{
>         		ps += '0';
>         	}
>         	ps = ps + s.substring(0,e-1);
>         	int i = en + 1;
>         	while ((i < ps.length()) && (ps.charAt(i) != '.') )
>         	{
>         		i++;
>         	}
>         	if (i != ps.length())
>         	{
>         		ps = ps.substring(0, i) + ps.substring(i+1);
>         	}
>         	System.out.println(ps);
>         }
>     	
>     }
> }
> 
> Memory Cost居然是1.75KB,看来我得优化一下.