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

標籤：

A - A+-B
Time Limit: 20 Sec

Memory Limit: 256 MB

題目串連

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 ( - 2^{63 ≤ A, B < 263).}

Output

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

Sample Input

15 27

Sample Output

42

HINT

 

題意

給你a,b，讓你輸出a+b或者a-b，需要保證輸出的值是一個integer

題解：

高精度一下，然後輸出最小的就好了

用的JAVA = =

代碼：

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));    }  }  

 

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