Counting even and odd elements in an array
Detailed guide and Python implementation for the 'Counting even and odd elements in an array' problem.
Problem Statement
Write a function count_even_odd(arr) that takes a list of integers arr and returns a tuple (even_count, odd_count) representing the number of even and odd elements in the array.
- •0 <= len(arr) <= 10^5
- •-10^9 <= arr[i] <= 10^9
Examples
arr = [1, 2, 3, 4, 5, 6]
(3, 3)
Even: 2, 4, 6 (count=3). Odd: 1, 3, 5 (count=3).
arr = [2, 4, 6, 8]
(4, 0)
All elements are even.
arr = [1, 3, 5]
(0, 3)
All elements are odd.
Need a Hint?
Edge Cases to Watch
- Empty input structures
- Single element inputs
- Large numerical bounds
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