grind 75

參考 Grind 75 questions 建立

Week 1

• 1. Two Sum
• 20. Valid Parentheses
• 21. Merge Two Sorted Lists
• 121. Best Time to Buy and Sell Stock
• 125. Valid Palindrome
• 226. Invert Binary Tree
• 242. Valid Anagram
• 704. Binary Search
• 733. Flood Fill
• 235. Lowest Common Ancestor of a Binary Search Tree
• 110. Balanced Binary Tree
• 141. Linked List Cycle
• 232. Implement Queue using Stacks

Week 2

• 278. First Bad Version
• 383. Ransom Note
• 70. Climbing Stairs
• 409. Longest Palindrome
• 206. Reverse Linked List
• 169. Majority Element
• 67. Add Binary
• 543. Diameter of Binary Tree
• 876. Middle of the Linked List
• 104. Maximum Depth of Binary Tree
• 217. Contains Duplicate
• 53. Maximum Subarray

Week 3

• 57. Insert Interval
• 542. 01 Matrix
• 973. K Closest Points to Origin
• 3. Longest Substring Without Repeating Characters
• 15. 3Sum
• 102. Binary Tree Level Order Traversal
• 133. Clone Graph
• 150. Evaluate Reverse Polish Notation

Week 4

• 207. Course Schedule
• 208. Implement Trie (Prefix Tree)
• 322. Coin Change
• 238. Product of Array Except Self
• 155. Min Stack
• 98. Validate Binary Search Tree
• 200. Number of Islands
• 994. Rotting Oranges

Week 5

• 33. Search in Rotated Sorted Array
• 39. Combination Sum
• 46. Permutations
• 56. Merge Intervals
• 236. Lowest Common Ancestor of a Binary Tree
• 981. Time Based Key-Value Store
• 721. Accounts Merge
• 75. Sort Colors

Week 6

• 139. Word Break
• 416. Partition Equal Subset Sum
• 8. String to Integer (atoi)
• 54. Spiral Matrix
• 78. Subsets
• 199. Binary Tree Right Side View
• 5. Longest Palindromic Substring
• 62. Unique Paths
• 105. Construct Binary Tree from Preorder and Inorder Traversal

Week 7

• 11. Container With Most Water
• 17. Letter Combinations of a Phone Number
• 79. Word Search
• 438. Find All Anagrams in a String
• 310. Minimum Height Trees
• 621. Task Scheduler
• 146. LRU Cache

Week 8

• 230. Kth Smallest Element in a BST
• 76. Minimum Window Substring
• 297. Serialize and Deserialize Binary Tree
• 42. Trapping Rain Water
• 295. Find Median from Data Stream
• 127. Word Ladder
• 224. Basic Calculator
• 1235. Maximum Profit in Job Scheduling
• 23. Merge k Sorted Lists
• 84. Largest Rectangle in Histogram