Count Elements With Strictly Smaller and Greater Elements

Example 1

Input: nums = [11,7,2,15]

Output: 2

Explanation: The element 7 has the element 2 strictly smaller than it and the element 11 strictly greater than it. Element 11 has element 7 strictly smaller than it and element 15 strictly greater than it. In total there are 2 elements having both a strictly smaller and a strictly greater element appear in nums.

Example 2

Input: nums = [-3,3,3,90]

Output: 2

Explanation: The element 3 has the element -3 strictly smaller than it and the element 90 strictly greater than it. Since there are two elements with the value 3, in total there are 2 elements having both a strictly smaller and a strictly greater element appear in nums.