Update README with LeetCode Daily Challenge

Author: jeremymanning

README.md

@@ -46,6 +46,7 @@ This means you'll always find an AI-generated solution to compare with or learn
 | November 24, 2025 | [1018](https://leetcode.com/problems/binary-prefix-divisible-by-5/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/1018) | 🟢 Easy |
 | November 25, 2025 | [1015](https://leetcode.com/problems/smallest-integer-divisible-by-k/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/1015) | 🟡 Medium |
 | November 26, 2025 | [2435](https://leetcode.com/problems/paths-in-matrix-whose-sum-is-divisible-by-k/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/2435) | 🔴 Hard |
+| November 27, 2025 | [3381](https://leetcode.com/problems/maximum-subarray-sum-with-length-divisible-by-k/description/?envType=daily-question) | [Click here](https://github.com/ContextLab/leetcode-solutions/tree/main/problems/3381) | 🟡 Medium |
 
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