Code Interview Note
  • 0. Introduction
  • 1. Basic
    • Python Basic
    • Java Basic
    • Primitive Type
    • Basic Question
    • Number
  • 2. Array and Numbers
    • General
    • TwoSum
    • Buy and Sell Stock
    • SubArray
      • SubArray + HashMap
    • Sliding Window
      • Sliding Window At Most Problem
    • Word Break
    • Passes Problem
    • Majority Element
    • Partition Array
    • Sort Colors
    • Anagram
    • Ugly Number
    • TwoPointer
    • Swipe Line
    • Calculator
    • Sudoku
  • 2.1 String
    • String
    • Palindrome
    • Parentheses
    • Decode String
    • Calculator
    • Abbreviation
  • 3. Linkedlist
    • Dummy Node
    • Double Pointers
  • 4. Stack and Queue
    • General
    • Increase/Decrease Stack
  • 5. Binary Search
    • General
    • BS on result
    • Save the half which has result
    • Rotated Sorted Array
    • Split Array Largest Sum
  • 6. Binary Tree
    • General
    • Path Sum
    • Lowest Common Ancestor
    • BST
    • Convert
    • Traverse
    • Valid Ordered Tree
    • Construct Binary Tree
    • Tree depth and width
    • Vertical Order Traverse
  • 7. Heap
    • Geneal
    • TopK
  • 8. Simulation
    • General
    • Read4
    • Encode Decode
    • LRU/LFU
    • Robot
    • GetRandom O(1)
    • Probability
  • 9. DFS
    • Backtrack
    • General
    • Subset
    • Permutation
    • Combination
  • 10. HashTable
    • General
  • 11. Sort
    • General
  • 12. Recursion
    • General
  • 13. Dynamic Programming
    • Graph
    • General
    • Coordinate
    • Double Sequence
    • Longest Common Subsequence
    • Rolling Array
    • House Robber
    • Backpack
    • Memorization
    • Diagonal
  • 14. BFS
    • General
    • Number of Islands
    • The Maze
  • 15. Graph
    • Shortest Path
    • Undirected Graph
    • Topology Sort
    • Word Ladder
    • Tarjan's Algo
  • 16. Divide & Conquer
    • General
  • 17. UnionFind
    • General
    • Grouping
  • 18. Trie
    • General
    • Word Square
  • 19. Company Summary
    • Oracle
    • Amazon
      • DP
    • Google
    • Hackerrank
    • LinkedIn
  • 20. Design
  • 21. Math
  • Behavior Question
  • Internet
  • OS
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3. Linkedlist

PreviousAbbreviationNextDummy Node

Last updated 5 years ago

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  • Merge two linked lists

  • Find middle of linkedlist

  1. (Merge Sort vs Quick Sort)

  2. 避免使用A.next.next.pre這種用法，降低可讀性

  3. 在做比較的時候先判定是否為null

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