[Solved] Given an integer array sorted in non-decreasing order, there is exactly one integer in the array that occurs more than 25% of the time, return that integer.

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Question

Given an integer array sorted in non-decreasing order, there is exactly one integer in the array that occurs more than 25% of the time, return that integer.

Example 1:

Input: arr = [1,2,2,6,6,6,6,7,10]
Output: 6

Example 2:

Input: arr = [1,1]
Output: 1

Constraints:

  • 1 <= arr.length <= 104
  • 0 <= arr[i] <= 105

Python Solution

class Solution:
    def findSpecialInteger(self, arr: List[int]) -> int:
        n = len(arr) // 4
        for i in range(len(arr)):
            if arr[i] == arr[i + n]:
                return arr[i]

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