Description

A collection of leetcode Problems' Solutions.

Structure

No.	Question	Topic/s
104	Maximum Depth of Binary Tree - py	Tree, Recursion
146	LRU Cache	Design, Doubly Linked-List, Hash-Table
3	Longest Substring Without Repeating Characters	Sliding-Window, Hash-Table, Set
1	Two Sum - py	Hash-Table, Array, Binary Search
5	Palindromic Substring - py	Dynamic-Programming, String, Manacher's Algo
96	Unique Binary Search Trees - py	Tree, Dynamic-Programming, Memoization, Recursion
98	Validate Binary Search Tree - py	Tree, Stack
702	Search in a Sorted Array of Unknown Size - py	Binary-Search
763	Partition Labels - py	Two-pointers, greedy
703	Kth Largest Element in a Stream - py	Hash
200	Number of Islands	BFS, DFS, Union Find, graph
54	Sprial Matrix - py	Array
421	Maximum XOR of Two Numbers in an Array	Trie, Bit Manipulation
1171	Count good meals	Array, Two Sum style, Bit Manipulation
226	Invert Binary Tree	Tree, Recursion
617	Merge Two Binary Trees	Tree, Recursion
253	Meeting Rooms II	Priority Queue/Heap
973	K Closest Points to Origin	Priority Queue/Heap
1930	Unique Length-3 Palindromic Subsequences	string, set
238	Product of Array Except Self	arrays
133	Clone Graph	Graph, DFS

MISC

1. To learn about spaced repetition technique - Interview Preparation Guide
2. Spaced Repetition LeetCode Template
3. Interview CheatSheet
4. Python CheatSheet