Leetcode

Posted 2020-12-18 lihello

Record the process of Leetcode by issue

Weekly Contest	Date
Weekly Contest 162	11/10/2019
BiWeekly Contest 13	11/16/2019
Weekly Contest 163	11/17/2019
Weekly Contest 166	12/8/2019
Weekly Contest 167	12/15/2019
Weekly Contest 168	12/22/2019

Num	Problem	Level	Topics	Date
409	Longest Palindrome	Easy	Hash Table	10/25/2019
290	Word Pattern	Easy	Array Two Pointers Binary Search	10/25/2019
49	Group Anagrams	Medium	Hash Table String	10/27/2019
3	Longest Substring Without Repeating Characters	Medium	Hash Table Two Pointers String Sliding Window	10/28/2019
187	Repeated DNA Sequences	Medium	Hash Table Bit Manipulation	10/29/2019
76	Minimum Window Substring	Hard	Hash Table Two Pointers String Sliding Window	10/30/2019
1237	Find Positive Integer Solution for a Given Equation	Easy	Math Binary Search	10/30/2019
113	Path Sum II	Medium	Tree Depth-first Search	10/30/2019
236	Lowest Common Ancestor of a Binary Tree	Medium	Tree	10/30/2019
114	Flatten Binary Tree to Linked List	Medium	Tree Depth-first Search	10/31/2019
199	Binary Tree Right Side View	Medium	Tree Depth-first Search Breadth-first Search	11/1/2019
207	Course Schedule	Medium	Depth-first Search Breadth-first Search Graph Topological Sort	11/2/2019
70	Climbing Stairs	Easy	Dynamic Programming	11/2/2019
198	House Robber	Easy	Dynamic Programming	11/3/2019
53	Maximum Subarray	Easy	Array Divide and Conquer Dynamic Programming	11/4/2019
322	Coin Change	Medium	Dynamic Programming	11/5/2019
120	Triangle	Medium	Array Dynamic Programming	11/6/2019
300	Longest Increasing Subsequence	Hard	Binary Search Dynamic Programming	11/8/2019
64	Minimum Path Sum	Medium	Array Dynamic Programming	11/9/2019
174	Dungeon Game	Hard	Dynamic Programming Binary Search	11/12/2019
200	Number of Islands	Medium	Depth-first Search Breadth-first Search Union Find	11/13/2019
1254	Number of Closed Islands	Medium	Depth-first Search	11/14/2019
127	Word Ladder	Medium	Breadth-first Search	11/15/2019
1255	Maximum Score Words Formed by Letters	Hard	Bit Manipulation	11/18/2019
1256	Encode Number	Medium	Bit Manipulation	11/22/2019
1260	Shift 2D Grid	Easy	Array	11/23/2019
1275	Find Winner on a Tic Tac Toe Game	Easy	Array	12/5/2019
126	Word Ladder II	Hard	Array Breadth-first Search String Backtracking	12/5/2019
1276	Number of Burgers with No Waste of Ingredients	Medium	Math Greedy	12/6/2019
473	Matchsticks to Square	Medium	Depth-first Search	12/7/2019
1283	Find the Smallest Divisor Given a Threshold	Medium	Binary Search	12/8/2019
1282	Group the People Given the Group Size They Belong To	Medium	Greedy	12/8/2019
1277	Count Square Submatrices with All Ones	Medium	Dynamic Programming Array	12/8/2019
1266	Minimum Time Visiting All Points	Easy	Array Geometry	12/10/2019
1267	Count Servers that Communicate	Medium	Array Graph	12/10/2019
551	Student Attendance Record I	Easy	String	12/11/2019
1268	Search Suggestions System	Medium	String	12/11/2019
1269	Number of Ways to Stay in the Same Place After Some Steps	Hard	Dynamic Programming	12/11/2019
1287	Element Appearing More Than 25% In Sorted Array	Easy	Array	12/15/2019
1288	Remove Covered Intervals	Medium	Line Sweep	12/15/2019
1291	Sequential Digits	Medium	Backtracking	12/15/2019
1292	Maximum Side Length of a Square with Sum Less than or Equal to Threshold	Medium	Array Binary Search	12/15/2019
1293	Shortest Path in a Grid with Obstacles Elimination	Hard	Breadth-first Search	12/17/2019
1286	Iterator for Combination	Medium	Design Backtracking	12/17/2019
1247	Minimum Swaps to Make Strings Equal	Medium	String Greedy	12/19/2019
1249	Minimum Remove to Make Valid Parentheses	Medium	String Stack	12/20/2019
1250	Check If It Is a Good Array	Hard	Math	12/20/2019
785	Is Graph Bipartite?	Medium	Breadth-first Search Depth-first Search Graph	12/21/2019
143	Reorder List	Medium	Linked List	12/21/2019
876	Middle of the Linked List	Easy	Linked List	12/21/2019
206	Reverse Linked List	Easy	Linked List	12/21/2019
929	Unique Email Addresses	Easy	String	12/21/2019
824	Goat Latin	Easy	String	12/22/2019
970	Powerful Integers	Easy	Math Hash Table	12/22/2019
104	Maximum Depth of Binary Tree	Easy	Tree Depth-first Search	12/22/2019
110	Balanced Binary Tree	Easy	Tree Depth-first Search	12/22/2019
1295	Find Numbers with Even Number of Digits	Easy	Array	12/23/2019
1296	Divide Array in Sets of K Consecutive Numbers	Medium	Greedy Array	12/23/2019
1297	Maximum Number of Occurrences of a Substring	Medium	Bit Manipulation String	12/23/2019
1304	Find N Unique Integers Sum up to Zero	Easy	Array	1/10/2020
1305	All Elements in Two Binary Search Trees	Medium	Sort Tree	1/10/2020
1306	Jump Game III	Medium	Breadth-first Search Graph	1/10/2010