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LeetCode 2144: Minimum Cost of Buying Candies With Discount – Java Greedy Approach Explained
Learn how to solve LeetCode 2144 Minimum Cost of Buying Candies With Discount using a greedy sorting approach in Java. Includes intuition, brute force approach, optimized solution, dry run, complexity analysis, interview explanation, and common mistakes.
LeetCode 235: Lowest Common Ancestor of a Binary Search Tree – Java BST Solution with Dry Run
Master LeetCode 235: Lowest Common Ancestor in a BST using Java. This guide covers the core intuition, brute force method, and optimized recursive solution, plus a detailed dry run, complexity analysis, interview tips, and common pitfalls to avoid.
LeetCode 2126: Destroying Asteroids – Java Greedy Algorithm Solution with Dry Run
Learn how to solve LeetCode 2126 Destroying Asteroids using a Greedy Algorithm in Java. Includes sorting intuition, brute force approach, optimized solution, dry run, complexity analysis, interview explanation, and common mistakes.
LeetCode 230: Kth Smallest Element in a BST – Java Recursive Inorder Traversal Solution
Learn how to solve LeetCode 230 Kth Smallest Element in a BST using inorder traversal in Java. Includes BST intuition, brute force approach, optimized recursive solution, dry run, complexity analysis, interview explanation, and common mistakes.
LeetCode 701: Insert into a Binary Search Tree – Java Recursive Solution with Dry Run
Learn how to solve LeetCode 701 Insert into a Binary Search Tree using recursion in Java. Includes BST intuition, brute force approach, optimized recursive solution, dry run, complexity analysis, interview explanation, and common mistakes.
Search in a Binary Search Tree (LeetCode 700) Java Solution with Explanation and Dry Run
Learn how to efficiently search for a value in a Binary Search Tree using Java with step-by-step explanation, intuition, recursion approach, dry run, and complexity analysis.
LeetCode 3121: Count the Number of Special Characters II – Java HashMap Solution Explained
Learn how to solve LeetCode 3121 Count the Number of Special Characters II using HashMap in Java. Includes intuition, brute force approach, optimized solution, dry run, complexity analysis, interview explanation, and common mistakes.
LeetCode 387: First Unique Character in a String – Java HashMap Solution Explained
Learn how to solve LeetCode 387 First Unique Character in a String using HashMap in Java. Includes brute force approach, optimized solution, intuition, dry run, complexity analysis, interview explanation, and common mistakes.
LeetCode 3120: Count the Number of Special Characters I – Java HashSet Solution Explained
Learn how to solve LeetCode 3120 Count the Number of Special Characters I using HashSet in Java. Includes intuition, brute force approach, optimized solution, dry run, complexity analysis, interview explanation, and common mistakes.