LeetCode Practise

Elegant solutions to LeetCode challenges in Java and Kotlin, thoughtfully crafted with a focus on readability consistent style, and adherence to modern standards across diverse topics. This repository is complemented by in-depth Medium blogs, offering comprehensive explanations for each solution

👇 Overview

LeetCode is the best platform to help you enhance your skills, expand your knowledge and prepare for technical interviews.

LeetCode: https://leetcode.com/nphausg

Medium: https://medium.com/@nphausg

💎 Challenges

🔥 Easy

Challenge	Java	Kotlin	Medium
0001. Two sum	Solution	Solution	Medium
0020. ValidParentheses	Solution	-	-
0026. Remove Duplicates	Solution	-	-
0027. Remove Element	Solution	-	-
0069. SqrtX	Solution	-	-
0104. Maximum Depth of Binary Tree	Solution	-	-
0111. Minimum Depth of Binary Tree	Solution	-	-
0125. Valid Palindrome	Solution	Solution	-
0118. Pascal's Triangle	Solution	-	-
0121. Best time to buy and sell stock	Solution	Solution	Medium
0136. Single Number	Solution	-	-
0217. Contains Duplicate	Solution	-	Medium
0242. Valid Anagram	Solution	Solution	-
0268. Missing Number	Solution	Solution	Medium
0374. Guess Number Higher or Lower	Solution	Solution	-
0375. Guess Number Higher or Lower II	Solution	Solution	-
0387. First Unique Character in a String	Solution	Solution	Medium
0389. Find the Difference	Solution	-	Medium
0409. Longest Palindrome	Solution	-	-
0495. Teemo Attacking	Solution	-	-
0509. Fibonacci Number	Solution	-	-
0594. Longest Harmonious Subsequence	Solution	-	Medium
0605. Can Place Flowers	Solution	-	-
0637. Average of Levels in Binary Tree	Solution	-	-
0704. Binary Search	Solution	Solution	-
0993. Cousins in Binary Tree	Solution	-	-
1051. Height Checker	Solution	-	-
1137. N-th Tribonacci Number	Solution	-	-
1351. Count Negative Numbers in a Sorted Matrix	Solution	-	-
1929. Concatenation Of Array	Solution	-	-
2273. Find Resultant Array After Removing Anagrams	Solution	-	-
2351. First Letter to Appear Twice	Solution	-	Medium
2529. Maximum Count of Positive Integer and Negative Integer	Solution	-	Medium
2824. Count Pairs Whose Sum is Less than Target	Solution	-	-
2848. Points That Intersect With Cars	Solution	-	Medium

🔥🔥 Medium

Challenge	Java	Kotlin	Medium
0003. Longest Substring Without Repeating Characters	Solution	Solution	-
0005. Longest Palindromic Substring	Solution	-	-
0017. Letter Combinations of a Phone Number	Solution	-	-
0039. Combination Sum	Solution	Solution	Medium
0040. Combination Sum II	Solution	Solution	-
0046. Permutations	Solution	-	Medium
0049. Group Anagrams	Solution	-	-
0053. Maximum Subarray	Solution	-	-
0056. Merge Intervals	Solution	-	-
0062. Unique Paths	Solution	Solution	-
0063. Unique Paths II	Solution	-	-
0064. Minimum Path Sum	Solution	-	-
0075. Sort colors	Solution	-	Medium
0091. Decode Ways	Solution	-	-
0093. Restore IP Addresses	Solution	-	-
0102. Binary Tree Level Order Traversal	Solution	-	-
0103. Binary Tree Zigzag Level Order Traversal	Solution	-	-
0107. Binary Tree Level Order Traversal II	Solution	-	-
0122. Best Time to Buy and Sell Stock II	Solution	-	Medium
0137. Single Number II	Solution	-	-
0139. Word Break	Solution	Solution	Medium
0146. LRU Cache	Solution	-	Medium
0198. House Robber	Solution	-	-
0208. Implement Trie (Prefix Tree)	Solution	Solution	Medium
0219. Contains Duplicate II	Solution	-	Medium
0238. Product of Array Except Self	Solution	-	Medium
0260. Single Number III	Solution	-	-
0438. Find All Anagrams in a String	Solution	-	-
0567. Permutation in String	Solution	-	Medium
0658. Find K Closest Elements	Solution	-	-
0714. Best Time to Buy and Sell Stock with Transaction Fee	Solution	-	Medium
0729. My Calendar I	Solution	-	Medium
1017. Convert to Base -2	Solution	-	-
1143. Longest Common Subsequence	Solution	-	-
3169. Count Days Without Meetings	Solution	-	-

🔥🔥🔥 Hard

Challenge	Java	Kotlin	Medium
0041. First Missing Positive	Solution	Solution	Medium
0220. Contains Duplicate III	Solution	-	Medium
2514. Count Anagrams	Solution	-	-

👇 Author