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)

#include<iostream>
using namespace std;
pair<int,int>h[1000000];
int add(char x,char y)
{
	return x==y;
}
int main()
{   string s;
	int n;
	cin>>n>>s;
	int len=s.length();
	for(int i=1; i<=len; i++)
	{
	  h[i]=make_pair(h[i-1].first+add(s[i-1],'W'),h[i-1].second+add(s[i-1],'E'));
	}
	int ans=1e9;
	for(int i=1; i<=len; i++)
	{
	  int t=h[i-1].first+
	  (h[len].second-h[i].second);
	  ans=min(ans,t);
	}
	cout<<ans;
	return 0;
}