1913. Maximum Product Difference Between Two Pairs

The product difference between two pairs (a, b) and (c, d) is defined as (a b) - (c d).

• For example, the product difference between (5, 6) and (2, 7) is (5 6) - (2 7) = 16.

Given an integer array nums, choose four distinct indices w, x, y, and z such that the product difference between pairs (nums[w], nums[x]) and (nums[y], nums[z]) is maximized.

Return the maximum such product difference.

class Solution {
public:
    int maxProductDifference(vector<int>& nums) {
        sort(nums.begin(), nums.end());
        int sz = nums.size();
        return (nums[sz - 1] * nums[sz - 2]) - (nums[0] * nums[1]);
    }
};