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3833. Count Dominant Indices

Description

You are given an integer array nums of length n.

An element at index i is called dominant if: nums[i] > average(nums[i + 1], nums[i + 2], ..., nums[n - 1])

Your task is to count the number of indices i that are dominant.

The average of a set of numbers is the value obtained by adding all the numbers together and dividing the sum by the total number of numbers.

Note: The rightmost element of any array is not dominant.

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Example 1:

Input: nums = [5,4,3]

Output: 2

Explanation:

  • At index i = 0, the value 5 is dominant as 5 > average(4, 3) = 3.5.
  • At index i = 1, the value 4 is dominant over the subarray [3].
  • Index i = 2 is not dominant as there are no elements to its right. Thus, the answer is 2.

Example 2:

Input: nums = [4,1,2]

Output: 1

Explanation:

  • At index i = 0, the value 4 is dominant over the subarray [1, 2].
  • At index i = 1, the value 1 is not dominant.
  • Index i = 2 is not dominant as there are no elements to its right. Thus, the answer is 1.

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Constraints:

  • 1 <= nums.length <= 100
  • 1 <= nums[i] <= 100​​​​​​​

Solutions

Solution 1

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