Code 996

This is my coding exercises.

LeetCode

Algorithm:

BS: binary search

BFS: breadth first search

BT: backtracking

DFS: depth first search

DC: divide & conquer

DP: dynamic programming

Data Structure:

LL: Linked List

ST: Stack

TR: Tree

#	Title	Solution	Difficulty	Liked	Remarks
17	Letter Combinations of a Phone Number	Python, Java	Medium		BT
20	Valid Parentheses	Python, Java	Easy
21	Merge Two Sorted Lists	Java	Easy		LL
34	Find First and Last Position of Element in Sorted Array	C++, Python, Java	Medium	👍	BS
39	Combination Sum	C++, Java, Go	Medium	👍	BT
46	Permutations	C++	Medium		BT
53	Maximum Subarray	C++, Python, Go	Easy	👍
64	Minimum Path Sum	C++, Go	Medium	👍	DP
69	Sqrt(x)	C++, Python	Easy		BS
70	Climbing Stairs	C++, Go	Easy	👍	DP
75	Sort Colors	C++, Python, Java	Medium
83	Remove Duplicates from Sorted List	Java	Easy		LL
88	Merge Sorted Array	C++, Python, Java	Easy
93	Restore IP Addresses	C++, Python, Java	Medium		BT
95	Unique Binary Search Tree II	C++, Python, Java	Medium	👍	DC, DP
110	Balanced Binary Tree		Easy		TR
121	Best Time to Buy and Sell Stock	C++, Python, Java	Easy
122	Best Time to Buy and Sell Stock II	C++, Python, Java, Go	Easy	👍
130	Surrounded Regions	C++, Python, Java, Go	Medium	👍	DFS
141	Linked List Cycle	C++, Python, Java	Easy
153	Find Minimum in Rotated Sorted Array	C++, Python	Medium	👍	BS
160	Intersection of Two Linked Lists	Java	Easy		LL
167	Two Sum II	C++, Java, Python, Go, Kotlin	Easy
206	Reverse Linked List	Java	Easy		LL
207	Course Schedule	C++, Java	Medium	👍	BFS
210	Course Schedule II	Java	Medium	👍	BFS
215	Kth Largest Element in an Array	C++, Python, Java	Medium
232	Implement Queue using Stacks	Java	Easy
241	Different Ways to Add Parentheses	C++, Python, Java	Medium	👍	DC, DP
278	First Bad Version	C++, Python, Java	Easy		BS
279	Perfect Squares	C++, Python, Java	Medium	👍	BFS, DP
343	Integer Break	C++, Java	Medium
345	Reverse Vowels of a String	C++, Python, Java	Easy
347	Top K Frequent Elements	C++, Python	Medium
392	Is Subsequence	C++, Python, Java	Easy
406	Queue Reconstruction by Height	C++, Python, Java	Medium	👍
435	Non-overlapping Intervals	C++, Python, Java	Medium
451	Sort Characters By Frequency	C++, Python, Java	Medium
452	Minimum Number of Arrows to Burst Balloons	C++, Python, Java	Medium
455	Assign Cookies	C++, Python, Java	Easy
524	Longest Word in Dictionary through Deleting	C++, Python, Java	Medium
540	Single Element in a Sorted Array	C++, Python	Medium	👍	BS
547	Friend Circles	C++, Python, Java, Go	Medium	👍	DFS
605	Can Place Flowers	C++, Python	Easy
633	Sum of Square Numbers	C++, Python, Java	Easy
665	Non-decreasing Array	C++, Python, Java	Easy
680	Valid Palindrome II	C++, Python	Easy
695	Max Area of Island	C++, Python, Java, Go	Medium		DFS
725	Split Linked List in Parts	Java	Medium		LL
739	Daily Temperatures	Java	Medium		ST
744	Find Smallest Letter Greater Than Target	C++, Python, Java	Easy		BS
763	Partition Labels	C++, Python, Java	Medium	👍
785	Is Graph Bipartite?	C++, Java	Medium	👍	DFS
1091	Shortest Path in Binary Matrix	C++, Python, Java, Go	Medium	👍	BFS