leetcode-practice-sol

My solutions to leetcode and neetcode problems

LeetCode Practice Tracker

#	Title	Difficulty	Pattern	Status
1768	Merge Strings Alternately	Easy	Two Pointers / Strings	✅
1431	Kids With the Greatest Number of Candies	Easy	Array / Comparison	✅
605	Can Place Flowers	Easy	Array / Greedy	✅
345	Reverse Vowels of a String	Easy	String	✅
151	Reverse Words in a String	Medium	String / Two Pointers	✅
238	Product of Array Except Self	Medium	Array / Prefix–Suffix	✅
283	Move Zeroes	Easy	Array / Two Pointers	✅
334	Increasing Triplet Subsequence	Medium	Array / Greedy	✅
443	String Compression	Medium	Array / Two Pointers	✅
392	Is Subsequence	Easy	Two Pointers	✅
11	Container With Most Water	Medium	Two Pointers	✅
1679	Max Number of K-Sum Pairs	Medium	Sorting / Two Pointers	✅
643	Maximum Average Subarray I	Easy	Sliding Window / Array	✅
1456	Max # of Vowels in a Substring of Length	Medium	Sliding Window / Strings	✅
1004	Max Consecutive Ones III	Medium	Sliding Window / Two Pointers	✅
1493	Longest Subarray of 1's After Deleting One Element	Medium	Sliding Window	✅
1732	Find the Highest Altitude	Easy	Prefix Sum / Running Total	✅
724	Find Pivot Index	Easy	Prefix Sum / Array	✅
2215	Find the Difference of Two Arrays	Easy	Hash Set / Array	✅
1207	Unique Number of Occurrences	Easy	Hash Map / Hash Set	✅
1657	Determine if Two Strings Are Close	Medium	Hash Map / Frequency	✅
2352	Equal Row and Column Pairs	Medium	Hash Map / Tuples / Matrix	✅
2390	Removing Stars From a String	Medium	Stack / String	✅
735	Asteroid Collision	Medium	Stack / Simulation	✅
394	Decode String	Medium	Stack / String Parsing	✅
933	Number of Recent Calls	Easy	Queue / Sliding Window	✅
649	Dota2 Senate	Medium	Queues / Simulation / Greedy	✅
2095	Delete the Middle Node of a Linked List	Medium	Linked List / Two Pointers	✅
328	Odd Even Linked List	Medium	Linked List / Two Pointers	✅
206	Reverse Linked List	Easy	Linked List	✅
2130	Max Twin Sum of a Linked List	Medium	Linked List / Fast–Slow / In-place Reverse	✅
104	Maximum Depth of Binary Tree	Easy	Tree / DFS / Recursion	✅
872	Leaf-Similar Trees	Easy	Tree / Stack (Iterative Inorder DFS)	✅
1448	Count Good Nodes in Binary Tree	Medium	Tree DFS / Stack	✅
437	Path Sum III	Medium	Tree / DFS (Recursion, start-from-each-node)	✅
1372	Longest ZigZag Path in a Binary Tree	Medium	Tree / DFS	✅
236	Lowest Common Ancestor of a Binary Tree	Medium	Tree / DFS	✅
199	Binary Tree Right Side View	Medium	Binary Tree / BFS	✅
1161	Maximum Level Sum of a Binary Tree	Medium	Binary Tree / BFS	✅
700	Search in a Binary Search Tree	Easy	BST / Iteration	✅
450	Delete Node in a BST	Medium	BST / Recursion	✅
88	Merge Sorted Array	Easy	Two Pointers / Array (from end)	✅
841	Keys and Rooms	Medium	Graph / DFS (Stack)	✅
547	Number of Provinces	Medium	Graph / DFS	✅
695	Max Area of Island	Medium	Graph / DFS (Grid)	✅

NeetCode 150

Title	Difficulty	Pattern	Status
Valid Anagram	Easy	Hash / Freq Map	✅
Two Sum	Easy	Hash Map / Array	✅
Group Anagrams	Medium	Hash Map / Strings	✅
Top K Frequent Elements	Medium	Hash Map / Bucket Sort	✅
Encode and Decode Strings	Medium	Strings / Pointer	✅
Valid Sudoku	Medium	2D Array	✅
Longest Consecutive Sequence	Medium	Hash Set / Linear Scan	✅
Valid Palindrome	Easy	Two Pointers / Strings	✅
Two Sum II	Medium	Two Pointers / Sorted	✅
Trapping Rain Water	Hard	Two Pointers	✅
Best Time to Buy and Sell Stock	Easy	Two Pointers / Window	✅
Longest Substring Without Repeating Characters	Medium	Sliding Window	✅
Longest Repeating Character Replacement	Medium	Sliding Window / Freq Map	✅
Permutation in String	Medium	Sliding Window / Freq Map	✅
Min Stack	Medium	Stack / Auxiliary Min Stack	✅
Valid Parentheses	Easy	Stack / Matching	✅
Evaluate Reverse Polish Notation	Medium	Stack / Evaluate	✅
Generate Parentheses	Medium	Backtracking / Constraints	✅