ACM HDOJ 1063 (Exponentiation)

import java.math.BigDecimal;
import java.util.Scanner;

public class Main {

public static void main(String[] args) {
Scanner scn = new Scanner(System.in);
while (scn.hasNext()) {
BigDecimal number = scn.nextBigDecimal();
number = number.pow(scn.nextInt());
String result = number.stripTrailingZeros().toPlainString();
if ('0' == result.charAt(0) && '.' == result.charAt(1)) {
result = result.substring(1);
}
System.out.println(result);
}
scn.close();
}

}