给自己开个刷题打卡贴！ Java

如题！坚持下去。。

2018.05.05

Easy:

• Best Time to Buy and Sell Stock
• First Unique Character in a String
  

Medium:

• Lowerst Common Ancestor of a Binary Tree
• Longest Palindromic Substring (recursion + memorization, DP)
• Product of Array Except Self
• Letter Combinations of a Phone number
  

Hard:

• Sliding Window Maximum (decreasing stack)
• Trapping Rain Water (DP, two pointers)
• Merge k sorted Lists (Best First Search)
  

2018.05.06

Easy:

• Baseall Game
• Reverse Linked List
• Lowest Common Ancestor of a Binary Search Tree
• Min Stack
• Palindrome Linked List
• Merge Two Sorted Lists
  

Medium:

• Word Ladder
• Add Two Numbers
• Search a 2D Matrix II (Binary Search, Divide and Conquer)
• Group Anagrams
• Validate Binary Search Tree
• Searialize and Deserialize BST
  

Hard:

• Serialize and Deserialize Binary Tree
• LFU Cache
  

2018.05.07

Easy:

• Intersection of Two Linked Lists
• Valid Anagram
  

Medium:

• Insert Delete GetRandom O(1)
• Longest Substring Without Repeating Characters
• Boundary of Binary Tree
• Word Break (recursion + memorization, 2D DP, 1D DP)
• Kth Largest Element in an Array
• Top K Frequent Words
• Binary Tree Level Order Traversal (DFS, BFS)
• Reverse Words in a String II
  

2018.05.03

Easy:

• Most Common Word
• Two Sum
• Valid Parenthese
  

Medium:

• Partition Labels
• Number of Islands (BFS, DFS, Union Find)
  

2018.05.04

Easy:

• Find All Anagrams in a string
  

Medium:

• Rotate Image (Iterative, recursive)
• Copy list with random pointer
  

Hard:

• LRU Cache
• Cut off trees for golf event
  

一天搞定这么多题，👍一个

注意总结题型啦 感觉要不就是特才，要不就是没把题目专研透

pxu 发表于 2018-5-8 10:49
注意总结题型啦 感觉要不就是特才，要不就是没把题目专研透

上班党伤不起  知识点有研究的。 现在按公司刷题，题目都尽量把所有能想到的解法写出来的。