Archives: 2022 | Di's Blog

2022

05

22

Solution to LeetCode 637 Average of Levels in Binary Tree, LeetCode 429 N-ary Tree Level Order Traversal, and LeetCode 5

2022-05-22 Binary Tree

21

LC 102 & LC 107 & LC 199

Solution to LeetCode 102 Binary Tree Level Order Traversal, LeetCode 107 Binary Tree Level Order Traversal II, and LeetC

2022-05-21 Binary Tree

Queue BFS

20

LC 94 & LC 144 & LC 145 & LC 102 (with template)

Solution to LeetCode 94 Binary Tree Inorder Traversal, LeetCode 144 Binary Tree Preorder Traversal, LeetCode 145 Binary

2022-05-20 Binary Tree

Stack Template Recursive

19

LC 239 & LC 347 & LC 973

Solution to LeetCode 239 Sliding Window Maximum & LeetCode 347 Top K Frequent Elements & LeetCode 973 K Closest

2022-05-19 Queue

Stack Queue Heap TopK

18

LC 225 & LC 20 & LC 1047 & LC 150

Solution to LeetCode 225 Implement Stack using Queues & LC 20 Valid Parentheses & LC 1047 Remove All Adjacent Du

2022-05-18 Stack

Stack Queue

17

LC 232

Solution to LeetCode 232 Implement Queue using Stacks. LeetCode 232Implement Queue using Stacks (Easy) [link] Python lis

2022-05-17 Queue

Stack Queue

16

JZ 05 & JZ 58

Solution to JZ 05 and JZ 58 II. JZ 05(Easy) [link] class Solution: def replaceSpace(self, s: str) -> str: cn

2022-05-16 String

Double Pointers String

15

LC 28 & LC 459

Solution to LeetCode 28 Implement strStr() and LeetCode 459 Repeated Substring Pattern. LeetCode 28Implement strStr(). (

2022-05-15 String

Double Pointers String Knuth–Morris–Pratt

14

LC 344 & LC 541 & LC 151

Solution to LeetCode 344 Reverse String & LeetCode 541 Reverse String II & LeetCode 151 Reverse Words in a Strin

2022-05-14 String

Double Pointers String

13

LC 15 & LC 18

Solution to LeetCode 15 3Sum and LeetCode 18 4Sum. LeetCode 153 Sum (Medium) [link] HashTable is not the best method her

2022-05-13 Double Pointers

Double Pointers

12

LC 1 & LC 454

Solution to LeetCode 1 Two Sum & LeetCode 454 4 Sum II LeetCode 1Two Sum (Easy) [link] 梦开始的地方。 This is where Dream

2022-05-12 HashTable

HashTable

11

LC 202

Solution to LeetCode 202 Happy Number LeetCode 202Happy Number (Easy) [link] 1] Hash Set. The calculated sum cannot be v

2022-05-11 HashTable

HashTable