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++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#import<ios>
int n,i,a[30001],le,lw,re,rw,m=1e9,res;
char s[30001];

int main()
{
	scanf("%d%s",&n,s);
	for (int i = 0; i < n; ++i)
	{
		if(s[i]=='E')
		{
			a[i]=0;
			re++;
		}
		else if(s[i]=='W')
		{
			a[i]=1;
			rw++;
		}
	}
	rw-a[0];
	re-~a[0];
	for (int i = 0; i < n-1; ++i)
	{
		m=m<re+lw?m:re+lw;
		if (a[i])
			lw++;
		else
			le++;
		if (a[i+1])
			rw--;
		else
			re--;
	}
	printf("%d",m);
	return 0;
}