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.

• Re:为什么老是WA啊,本机完全可以通过. (1974) BillStone 2004-10-19 13:20:27