This is the notebook of my LeetCode solution and notes.

#1324. Print Words Vertically

#468. Validate IP Address

#151. Reverse Words in a String

#50. Pow(x, n)

#1431.Kids With the Greatest Number of Candies

#1385.Find the Distance Value Between Two Arrays

#1337.The K Weakest Rows in a Matrix

#15. 3Sum (front pointer and back pointer)

#347. Top K Frequent Elements (Heap)

#203. Remove Linked List Elements

#1043.Partition Array for Maximum Sum

#264. Ugly Number II (Universal DP)

#275. H-Index II (binary search)

#441. Arranging Coins (binary search)

#107. Binary Tree Level Order Traversal II (BFS Tree)

#79. Word Search (DFS)

#797. All Paths From Source to Target (DFS)

#107. Binary Tree Level Order Traversal II (BFS Tree)

#106. Construct Binary Tree from Inorder and Postorder Traversal (Recursion)

#1.Two Sum

#231.Power of two

#461. Hamming Distance

#1185.Day of the Week (Date)

#2. Add Two Numbers

#66. Plus One (similar with #2)

#957. Prison Cells After N Days (find the cycle)

#1344. Angle Between Hands of a Clock (calculate the small angle between minute and hour pointer)