2148. Count Elements With Strictly Smaller and Greater Elements

Description

Given an integer array nums, return the number of elements that have both a strictly smaller and a strictly greater element appear in nums.

 

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.

 

Constraints:

• 1 <= nums.length <= 100
• -105 <= nums[i] <= 105

Solution

count-elements-with-strictly-smaller-and-greater-elements.py

class Solution:
    def countElements(self, nums: List[int]) -> int:
        nums.sort()
        res = 0
        n = len(nums)

        for i in range(1, n - 1):
            smaller = False

            for j in range(i):
                if nums[j] < nums[i]:
                    smaller = True
                    break

            if not smaller: continue

            larger = False

            for j in range(i + 1, n):
                if nums[j] > nums[i]:
                    larger = True
                    break

            if not larger: continue

            res += 1


        return res