Category

Sliding-Window

Question	Difficulty	Efficiency	Date
📖 Leetcode-2024:Maximize the Confusion of an Exam	⭐⭐	B	2024-9-2
📖 Leetcode-2379:Minimum Recolors to Get K Consecutive Black Blocks	⭐	B+	2024-4-21

DP

Question	Difficulty	Efficiency	Date
📖 Leetcode-122: Best Time to Buy and Sell Stock II	⭐⭐	B+	2024-9-4
📖 Leetcode-45:Jump Game II	⭐⭐	A	2024-9-3
📖 Leetcode-72:Edit Distance	⭐⭐	C+	2024-8-29
📖 Leetcode-63-:Unique Paths II	⭐⭐	A	2024-8-23
📖 Leetcode-62-:Unique Paths	⭐⭐	B	2024-8-23
📖 Leetcode-377:Combination Sum IV	⭐⭐	A-	2024-4-23

Greedy

Question	Difficulty	Efficiency	Date
📖 Leetcode-122: Best Time to Buy and Sell Stock II	⭐⭐	B+	2024-9-4

LinkedList

Question	Difficulty	Efficiency	Date
📖 Leetcode-92: Reverse Linked List II	⭐⭐	A-	2024-9-7
📖 Leetcode-138: Copy List with Random Pointer	⭐⭐	A-	2024-9-6
📖 Leetcode-2: Add Two Numbers	⭐⭐	A+	2024-9-5
📖 Leetcode-141: Linked List Cycle	⭐	A	2024-9-5

Dual Pointer

Question	Difficulty	Efficiency	Date
📖 Leetcode-15: 3Sum	⭐⭐	-	2023-3-23
📖 Leetcode-11: Container With Most Water	⭐⭐	-	2021

DFS

Question	Difficulty	Efficiency	Date
📖 Leetcode-226: Invert Binary Tree	⭐	A+	2024-9-5

Tree

Question	Difficulty	Efficiency	Date
📖 Leetcode-226: Invert Binary Tree	⭐	A+	2024-9-5

Hash

Question	Difficulty	Efficiency	Date
📖 Leetcode-01: Two Sum	⭐	A-	2021

Heap

Question	Difficulty	Efficiency	Date
📖 Leetcode-373:Find K Pairs with Smallest Sums	⭐⭐	B+	2024-5-4

Math

Question	Difficulty	Efficiency	Date
📖 Leetcode-621:Task Scheduler	⭐⭐	B+	2024-4-27
📖 Leetcode-260:Single Number III	⭐⭐	B+	2021

Recursion

Question	Difficulty	Efficiency	Date
📖 Leetcode-139:Word Break	⭐⭐	A-	22/Aug/2024
📖 Leetcode-21:Merge Two Sorted Lists	⭐⭐	B+	2021