BUPT-2-A-B Problem

A-B Problem

Accept:828	Submit:7190
Time Limit:1000MS	Memory Limit:65536KB

Description
Calculate A-B

Input
Two decimal integers a and b(-10^100 < a,b < 10^100) in one line, separated by one space.

Output
Output a-b in one line.

Sample Input

1 2

Sample Output

-1

Source
BUPT Online Judge

CODE:

import java.math.BigInteger;
import java.util.Scanner;
public class Main{

    public static void main(String args[]) {
       Scanner cin=new Scanner(System.in);
     
       BigInteger a,b;
     
    	   a=cin.nextBigInteger();
    	   b=cin.nextBigInteger();
           a=a.subtract(b);
    	
    	   System.out.println(a.toString());
     
    }
}