Problem:
Score : 100 points

Problem Statement

You are given two integers A and B.
Find the largest value among A+B, A-B and A \times B.

Constraints

-1000 \leq A,B \leq 1000

All values in input are integers.

Input

Input is given from Standard Input in the following format:

A B

Output

Print the largest value among A+B, A-B and A \times B.

Sample Input 1

3 1

Sample Output 1

4

3+1=4, 3-1=2 and 3 \times 1=3. The largest among them is 4.

Sample Input 2

4 -2

Sample Output 2

6

The largest is 4 - (-2) = 6.

Sample Input 3

0 0

Sample Output 3

0

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>

int main(void)
{
	int a, b, c;
	int ans1, ans2, ans3, ans;
	scanf("%d %d %d", &a, &b, &c);
	ans1 = a + b;
	ans2 = a - b;
	ans3 = a * b;
	if(ans1 > ans2) {
		ans = ans1;
	} else {
		ans = ans2;
	}
	if(ans3 > ans) {
		ans = ans3;
	}
	printf("%d\n", ans);
}