hdu 6225 Little Boxes

题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=6225

解析：求四个数的和，大整数加法
代码：

import java.io.*;import java.math.BigInteger;import java.util.*;public class Main {    public static Scanner s = new Scanner(System.in);    public static void main(String args[]) throws Exception {        int t;        t = s.nextInt();        while(t-- != 0)        {            BigInteger x;            BigInteger sum = new BigInteger("0");            for (int i = 1; i <= 4; i++)            {                x = s.nextBigInteger();                sum = sum.add(x);            }            System.out.println(sum);        }    }}