HDU-2003 求绝对值

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

public class Main {

public static void main(String[] args) {
Scanner cin = new Scanner(new BufferedInputStream(System.in));
while(cin.hasNext()) {
double x = cin.nextDouble();
x = Math.abs(x);
DecimalFormat layout = new DecimalFormat("0.00");
System.out.println(layout.format(x));
}
cin.close();
}

}