Codeforces Gym 100418A A - A+-B java高精度

A - A+-B
Time Limit: 20 Sec

Memory Limit: 256 MB

题目连接

http://acm.hust.edu.cn/vjudge/contest/view.action?cid=86686#problem/A

Description

You are given the integer numbers A and B. Output A + B or A - B.

Input

The first line contains two numbers A, B separeted by a single space ( - 2⁶³ ≤ A, B < 2⁶³).

Output

Output one integer number: A + B or A - B.

Sample Input

15 27

Sample Output

42

HINT

题意

给你a,b，让你输出a+b或者a-b，需要保证输出的值是一个integer

题解：

高精度一下，然后输出最小的就好了

用的JAVA = =

代码：

import java.util.*;
import java.io.*;
import java.math.*;
public class Main
{
    public static void main(String [] args)
    {
        Scanner in = new Scanner(System.in);
        BigInteger a = in.nextBigInteger();
        BigInteger b = in.nextBigInteger();
        BigInteger c = a.add(b);
        BigInteger d = a.subtract(b);
        BigInteger f;
        BigInteger kiss;
        kiss = BigInteger.valueOf(0);
        f = BigInteger.valueOf(-1);
        int test = d.compareTo(kiss);
        if( test == -1 )
            d = d.multiply(f);
        test = c.compareTo(d);
        if( test == 1 )
            System.out.println(a.subtract(b));
        else
            System.out.println(a.add(b));
    }
}