chapter 13: Hash table

• Hash table - Easy
  • 1. Two Sum
  • 136. Single Number
  • 202. Happy Number
  • 204. Count Primes
  • 205. Isomorphic Strings
  • 217. Contains Duplicate
  • 219. Cotains Duplicate 2
  • 242. Valid Anagram
  • 290. Word Pattern
  • 349. Intersection of Two Arrays
  • 350. Intersection of Two Arrays 2
  • 389. Find the Difference
  • 409. Longest Palindrome
  • 438. Find All Anagrams in a String
  • 447. Number of Boomerangs
  • 463. Island Perimeter
  • 575. Distribute Candies
  • 594. Longest Harmonious Subsequence
  • 599. Minimum Index Sum of Two Lists
• Hash table - Easy 2
  • 1. Two Sum
  • 3. Longest substring without repeating charater
  • 36. Valid Sudoku
  • 49. Group Anagrams
  • 128. Longest Consecutive Sequence
  • 146. LRU Cache
  • 149. Max Points on a line
  • 187. Repeated DNA Sequences
• Hash table - Medium
  • New
• Hash table - Hard
  • New