LeetCode problem solutions
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The Remove Linked List Elements problem is a fundamental linked list manipulation challenge that teaches essential pointer handling techniques. This problem is excellent for understanding when and why to use dummy nodes in linked list operations.
The Minimum Subarray Sum problem (also known as "Minimum Size Subarray Sum") is an excellent introduction to the sliding window technique. This problem demonstrates how we can optimize from a brute force O(n³) solution to an elegant O(n) solution.
The Maximum Depth of Binary Tree problem is a classic tree traversal challenge that introduces fundamental concepts of tree algorithms. This problem is perfect for understanding the relationship between recursion and tree structures.
The "Length of Last Word" problem is a fundamental string processing challenge that tests your understanding of string manipulation and edge case handling. Let's explore multiple approaches to solve this problem efficiently.