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LeetCode 39: Combination Sum – Java Backtracking Solution with Dry Run & Complexity
Master LeetCode 39 Combination Sum using Backtracking in Java with easy explanation, recursion tree, intuition, dry run, complexity analysis, and optimized coding approach.
LeetCode 2078: Two Furthest Houses With Different Colors | Java Solution Explained (Step-by-Step Guide)
Understand the problem deeply with examples, then master an optimal O(n) solution using a simple observation.
LeetCode 1855 Maximum Distance Between Pair of Values | Two Pointer Java Solution
Learn how to solve LeetCode 1855 using the two-pointer technique. Includes intuition, dry run, optimized Java code, and alternative approaches.
LeetCode 3783 Mirror Distance of an Integer | Java Solution Explained
Learn how to solve LeetCode 3783 using digit reversal and math. Includes Java code, examples, and step-by-step explanation.
Quick Sort Algorithm Explained | Java Implementation, Partition Logic & Complexity
Learn Quick Sort with detailed intuition, partition logic, Java code, dry run, and complexity analysis. Perfect for coding interviews and DSA.
Merge Sort Algorithm Explained | Java Implementation, Intuition & Complexity
Learn Merge Sort with step-by-step explanation, recursion, iterative approach, Java code, and complexity analysis. Perfect for coding interviews.
LeetCode 22 Generate Parentheses | Backtracking Java Solution Explained
Learn how to solve LeetCode 22 using backtracking. Includes intuition, decision tree, constraints, and Java code with explanation.
LeetCode 784 Letter Case Permutation | Recursion & Backtracking Java Solution
Learn how to solve LeetCode 784 using recursion and backtracking. Includes decision tree, Java code, and step-by-step explanation.
LeetCode 3761 Minimum Absolute Distance Between Mirror Pairs | Java HashMap Solution
Solve LeetCode 3761 using an optimized HashMap approach. Learn intuition, naive vs optimized solution, and Java code with detailed explanation.