You are given an integer array nums.
Return an integer denoting the first even integer (earliest by array index) that appears exactly once in nums. If no such integer exists, return -1.
An integer x is considered even if it is divisible by 2.
Example 1:
Input: nums = [3,4,2,5,4,6]
Output: 2
Explanation:
Both 2 and 6 are even and they appear exactly once. Since 2 occurs first in the array, the answer is 2.
Example 2:
Input: nums = [4,4]
Output: -1
Explanation:
No even integer appears exactly once, so return -1.
Constraints:
1 <= nums.length <= 1001 <= nums[i] <= 100Solutions for this problem are being prepared.
Try solving it yourselfPractice First Unique Even Element with our built-in code editor and test cases.
Practice on FleetCodePractice this problem
Open in Editor