hchyeria / stcaweeklycodechallenge

STCAWeeklyCodeChallenge

WEEK 1 Array

Id	Title	Difficulty	Tag
1	Two Sum	E	HashTable | TwoPointer
53	Maximum Subarray	E	DP
121	Best Time to Buy and Sell Stock	E	DP
11	Container With Most Water	M	TwoPointer
15	3Sum	M	Sort | TwoPinter
31	Next Permutation	M	Array | Greedy
33	Search in Rotated Sorted Array	M	BinarySearch
54	Spiral Matrix	M	Array
56	Merge Intervals	M	Sort | TreeMap
42	Trapping Rain Water	H	Stack | TwoPointers | Greedy

WEEK 2 LinkedList

Id	Title	Difficulty	Tag
21	Merge Two Sorted Lists	E	LinkedList
203	Remove Linked List Elements	E	LinkedList
206	Reverse Linked List	E	LinkedList
2	Add Two Numbers	M	LinkedList
86	Partition List	M	LinkedList
138	Copy List with Random Pointer	M	LinkedList | Heap
142	Linked List Cycle II	M	LinkedList | TwoPointer
148	Sort List	M	Sort | LinkedList
426	Convert Binary Search Tree to Sorted Doubly Linked List	M	LinkedList | Tree | Stack
25	Reverse Nodes in k-Group	H	LinkedList

WEEK 3 Tree

Id	Title	Difficulty	Tag
107	Binary Tree Level Order Traversal II	E	Tree | Recursion
112	Path Sum	E	Tree
226	Invert Binary Tree	E	Tree | BFS
94	Binary Tree Inorder Traversal	M	Tree | Stack
95	Unique Binary Search Trees II	M	DP | BST
144	Binary Tree Preorder Traversal	M	Tree | Stack
236	Lowest Common Ancestor of a Binary Tree	M	Tree
124	Binary Tree Maximum Path Sum	H	Tree
145	Binary Tree Postorder Traversal	H	Tree | Stack
297	Serialize and Deserialize Binary Tree	H	Tree | Recursion

WEEK 4 BackTrack

Id	Title	Difficulty	Tag
17	Letter Combinations of a Phone Number	M	DFS
22	Generate Parentheses	M	DFS
46	Permutations	M	DFS
51	N-Queens	H	DFS
78	Subsets	M	DFS
93	Restore IP Addresses	M	DFS
401	Binary Watch	E	DFS
687	Longest Univalue Path	E	Tree | Recursion
698	Partition to K Equal Sum Subsets	M	DFS | DP | Bit Mask
726	Number of Atoms	H	Recursion

WEEK 5 DFS & BFS

Id	Title	Difficulty	Tag
101	Symmetric Tree	E	Tree | Recursion | Stack
104	Maximum Depth of Binary Tree	E	Tree | Recursion
108	Convert Sorted Array to Binary Search Tree	E	Tree | Recursion | Stack | BFS
105	Construct Binary Tree from Preorder and Inorder Traversal	M	Tree | Recursion
109	Convert Sorted List to Binary Search Tree	M	Tree | Recursion | LinkedList
114	Flatten Binary Tree to Linked List	M	Tree | Recursion | Stack
116	Populating Next Right Pointers in Each Node	M	Tree | Recursion | BFS
199	Binary Tree Right Side View	M	Tree | Recursion
394	Decode String	M	Stack | DFS
488	Zuma Game	H	DFS

WEEK 6 Dynamic Programming

Id	Title	Difficulty	Tag
70	Climbing Stairs	E	DP
198	House Robber	E	DP
303	Range Sum Query - Immutable	E	DP
5	Longest Palindromic Substring	M	DP
64	Minimum Path Sum	M	DP
139	Word Break	M	DP | HashSet
300	Longest Increasing Subsequence	M	DP | Binary Search
309	Best Time to Buy and Sell Stock with Cooldown	M	DP
322	Coin Change	M	DP
72	Edit Distance	H	DP

WEEK 7 Greedy

Id	Title	Difficulty	Tag
122	Best Time to Buy and Sell Stock II	E	Greedy
455	Assign Cookies	E	Greedy
55	Jump Game	M	DP | Greedy
134	Gas Station	M	Greedy
376	Wiggle Subsequence	M	DP | Greedy
406	Queue Reconstruction by Height	M	Greedy
621	Task Scheduler	M	Greedy | PriorityQueue
714	Best Time to Buy and Sell Stock with Transaction Fee	M	DP | Greedy
45	Jump Game II	H	Greedy
135	Candy	H	Greedy