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: Wrong Answer)

#include <stdio.h>
#include <stdlib.h>

int main()
{
    long long int a,b,m,n,k;

    while(~scanf("%lld %lld",&a,&b))
    {
        m=a+b;
        n=a*b;
        k=a-b;
        if(m>n&&m>k)
            printf("%lld\n",m);
            if(n>m&&n>k)
            printf("%lld\n",n);
            if(k>n&&k>m)
            printf("%lld\n",k);
            if(n==m&&n<k)
                printf("%lld\n",k);
            if(n==m&&n>k)
                printf("%lld\n",m);
                if(n==k&&n<m)
                printf("%lld\n",m);
                if(n==k&&n>m)
                printf("%lld\n",n);
            if(k==m&&k<n)
                printf("%lld\n",n);
                if(k==m&&k>n)
                printf("%lld\n",k);
            if(m==n&&k==n)
                printf("%lld\n",n);



    }

    return 0;
}