Formatted question description: https://leetcode.ca/all/1550.html

1550. Three Consecutive Odds (Easy)

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

Related Topics:
Array

Solution 1.

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

// Time: O(N)
// Space: O(1)
class Solution {
public:
    bool threeConsecutiveOdds(vector<int>& arr) {
        int cnt = 0;
        for (int n : arr) {
            if (n % 2) ++cnt;
            else cnt = 0;
            if (cnt >= 3) return true;
        }
        return false;
    }
};

Java

class Solution {
    public boolean threeConsecutiveOdds(int[] arr) {
        int length = arr.length;
        for (int i = 2; i < length; i++) {
            if (arr[i - 2] % 2 == 1 && arr[i - 1] % 2 == 1 && arr[i] % 2 == 1)
                return true;
        }
        return false;
    }
}

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