MaxProdTwoElementsArray.java

package techQuestions;

/*
Purpose: InseGiven the array of integers nums, you will choose two different indices i and j of that array.
Return the maximum value of (nums[i]-1)*(nums[j]-1).


Example 1:

Input: nums = [3,4,5,2]
Output: 12
Explanation: If you choose the indices i=1 and j=2 (indexed from 0), you will get the maximum value,
that is, (nums[1]-1)*(nums[2]-1) = (4-1)*(5-1) = 3*4 = 12.
Example 2:

Input: nums = [1,5,4,5]
Output: 16
Explanation: Choosing the indices i=1 and j=3 (indexed from 0), you will get the maximum value of (5-1)*(5-1) = 16.
Example 3:

Input: nums = [3,7]
Output: 12

Author: Erich Meissner
Date: 5/30/2020
Time: 10:31 PM
*/


import java.util.Arrays;

public class MaxProdTwoElementsArray {
    public static void main(String[] args) {
        int[] nums = {3,4,5,2};
        System.out.println(maxProduct(nums));
    }

    public static int maxProduct(int[] nums) {
        Arrays.sort(nums);

        int last = nums[nums.length - 1] - 1;
        int secLast = nums[nums.length - 2] - 1;
        return last * secLast;
    }
}