LeetCode 1550. Three Consecutive Odds

Description

https://leetcode.com/problems/three-consecutive-odds/

Given an integer array arr, return true if there are three consecutive odd numbers in the array. Otherwise, return false.

Example 1:

Input: arr = [2,6,4,1]
Output: false
Explanation: There are no three consecutive odds.

Example 2:

Input: arr = [1,2,34,3,4,5,7,23,12]
Output: true
Explanation: [5,7,23] are three consecutive odds.

Constraints:

  • 1 <= arr.length <= 1000
  • 1 <= arr[i] <= 1000

Explanation

Iterate numbers and check if there are three consecutive odds.

Python Solution

class Solution:
    def threeConsecutiveOdds(self, arr: List[int]) -> bool:
        
        count = 0
        
        for num in arr:
            if num % 2 != 0:
                count += 1
            else:
                count = 0
            
            if count == 3:
                return True
        
        return False
            
  • Time Complexity: O(N).
  • Space Complexity: O(1).

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