hdu 1753 大明A+B

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


public class Main 
{
    public static void main(String arg[])
    {
        BigDecimal a,b,c;
        Scanner cin = new Scanner(System.in);
        while(cin.hasNext())
        {
            a=cin.nextBigDecimal();
            b=cin.nextBigDecimal();
            c=a.add(b);
            //System.out.println(c.stripTrailingZeros());
            System.out.println(c.stripTrailingZeros().toPlainString());
            
            
        }
    }
}

http://acm.hdu.edu.cn/showproblem.php?pid=1753