coding practice - advanced topics

Introduction
Bitwise XOR
- # 268 - Missing Number
Sliding Window
Two Pointer
Fast & Slow Pointer
Merge Intervals
Next Greater Element
Cyclic Sort
In-place Reversal of a LinkedList
Dynamic Programming
Geometry
- # 836 - Rectangle Overlap
Union Find
Run-Length Encoding
- # 443 - String Compression
- # 809 - Expressive Words
Encode and Decode
- # 271 - Encode and Decode Strings
- # 428 - Serialize and Deserialize N-ary Tree
Design Cache
Two Heaps
Topological Sort
Top 'K' elements
K-way merge
- # 23 - Merge k Sorted Lists
Design Game
- # 353 - Design Snake Game
- # 348 - Design Tic-Tac-Toe
Design common data structure
- # 706 - Design HashMap
Calculator
- # 227 - Basic Calculator II
- # 224 - Basic Calculator

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# 381 - Insert Delete GetRandom O(1) - Duplicates allowed

Previous# 380 - Insert Delete GetRandom O(1)NextTwo Heaps

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