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 max(int x, int y)
{
	if (x > y)
		return x;
	else
		return y;

}
int main(void)
{
	int a;
	int b;
	int P;
	int Q;
		int R;
		int M;
		int N;
		scanf("%d", &a);
		scanf("%d", &b);
		P = a + b;
		Q = a - b;
		R = a * b;
		M = max(P, Q);
		N = max(M, R);
		printf("%d", N);
		return 0;

}