# 10.06.2025 [3442. Maximum Difference Between Even and Odd Frequency I]

Описание: 10.06.2025
[3442. Maximum Difference Between Even and Odd Frequency I](https://leetcode.com/problems/maximum...) easy
[blog post](https://leetcode.com/problems/maximum...)
[substack](https://open.substack.com/pub/dmitrii...)
[youtube](   • # 10.06.2025 [3442. Maximum Difference Bet...  )

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https://t.me/leetcode_daily_unstoppab...

#### Problem TLDR

Max odd - min even frequency #easy

#### Intuition

Find all frequencies, then do the search.

#### Approach

use built-in methods like `groupBy`
compare with hand-crafted iterative code performance

#### Complexity

Time complexity:
$$O(n)$$

Space complexity:
$$O(1)$$

#### Code
https://dmitrysamoylenko.com/2023/07/...