POJ 1001 Exponentiation

import java.io.*;
import java.util.Scanner;
import java.math.*;

public class Main
{
public static void main(String[] args)
{
Scanner cin = new Scanner(System.in);
while(cin.hasNext()) {
int m;
String sn;
sn = cin.next();
m = cin.nextInt();
BigDecimal n = new BigDecimal(sn);
String ans = n.pow(m).toPlainString();
if(ans.charAt(0) != '0') System.out.print(ans.charAt(0));
int len = ans.length();
while(ans.charAt(len - 1) == '0') len--;
if(ans.charAt(len - 1) == '.') len--;
for(int i = 1;i < len;i++) System.out.print(ans.charAt(i));
if(len == 1 && ans.charAt(0) == '0') System.out.print('0');
System.out.print('\n');
}
}
}