imagine-hussain / leetcode

LeetCode

List based off Grind 72 @ 19hrs, 8 weeks

Done BeforeHand

1. Two Sum
2. Valid Parentheses
3. Merge Two Sorted Lists
4. Best Time to Buy and Sell Stock
5. Valid Palindrome
6. Invert Binary Tree
7. Valid Anagram
8. Binary Search
9. Flood Fill
10. Lowest Common Ancestor of a Binary Search Tree
11. Balanced Binary Tree
12. Linked List Cycle
13. Implement Queue using Stacks
14. First Bad Version
15. Ransom Note
16. Climbing Stairs
17. Longest Palindrome
18. Reverse Linked List
19. Majority Element
20. Add Binary

Week 1

21. Diameter of Binary Tree
22. Middle of the Linked List
23. Maximum Depth of Binary Tree
24. Contains Duplicate
25. Meeting Rooms
26. Roman to Integer
27. Backspace String Compare
28. Counting Bits
29. Same Tree
30. Number of 1 Bits
31. Longest Common Prefix
32. Single Number
33. Palindrome Linked List
34. Move Zeroes
35. Symmetric Tree
36. Missing Number
37. Palindrome Number
38. Convert Sorted Array to Binary Search Tree

Week 2

39. Reverse Bits
40. Subtree of Another Tree
41. Squares of a Sorted Array

Medium Problems Start Here

42. Maximum Subarray
43. Insert Interval
44. 01 Matrix
45. K Closest Points to Origin
46. Longest Substring Without Repeating Characters
47. 3Sum
48. Binary Tree Level Order Traversal
49. Clone Graph
50. Evaluate Reverse Polish Notation
51. Course Schedule
52. Implement Trie (Prefix Tree)
53. Coin Change
54. Product of Array Except Self
55. Min Stack
56. Validate Binary Search Tree
57. Number of Islands
58. Rotting Oranges
59. Search in Rotated Sorted Array

Week 3

60. Combination Sum
61. Permutations
62. Merge Intervals
63. Lowest Common Ancestor of a Binary Tree
64. Time Based Key-Value Store
65. Accounts Merge
66. Sort Colors
67. Word Break
68. Partition Equal Subset Sum
69. String to Integer (atoi)
70. Spiral Matrix
71. Subsets
72. Binary Tree Right Side View
73. Longest Palindromic Substring
74. Unique Paths
75. Construct Binary Tree from Preorder and Inorder Traversal
76. Container With Most Water
77. Letter Combinations of a Phone Number
78. Word Search
79. Find All Anagrams in a String
80. Minimum Height Trees
81. Task Scheduler
82. LRU Cache

Week 4

83. Kth Smallest Element in a BST
84. Daily Temperatures
85. House Robber
86. Gas Station
87. Next Permutation
88. Valid Sudoku
89. Group Anagrams
90. Maximum Product Subarray
91. Design Add and Search Words Data Structure
92. Pacific Atlantic Water Flow
93. Remove Nth Node From End of List
94. Shortest Path to Get Food
95. Find the Duplicate Number
96. Top K Frequent Words
97. Longest Increasing Subsequence
98. Graph Valid Tree
99. Course Schedule II
100. Swap Nodes in Pairs
101. Path Sum II
102. Longest Consecutive Sequence

Week 5

103. Rotate Array
104. Odd Even Linked List
105. Decode String
106. Contiguous Array
107. Maximum Width of Binary Tree
108. Find K Closest Elements
109. Longest Repeating Character Replacement
110. Inorder Successor in BST
111. Jump Game
112. Add Two Numbers
113. Generate Parentheses
114. Sort List
115. Number of Connected Components in an Undirected Graph
116. Minimum Knight Moves
117. Subarray Sum Equals K
118. Asteroid Collision
119. Random Pick with Weight
120. Kth Largest Element in an Array
121. Maximal Square

Week 6

122. Rotate Image
123. Binary Tree Zigzag Level Order Traversal
124. Design Hit Counter
125. Path Sum III
126. Pow(x, n)
127. Search a 2D Matrix
128. Largest Number
129. Decode Ways
130. Meeting Rooms II
131. Reverse Integer
132. Set Matrix Zeroes
133. Reorder List
134. Encode and Decode Strings
135. Cheapest Flights Within K Stops
136. All Nodes Distance K in Binary Tree

Week 7

137. 3Sum Closest
138. Rotate List
139. Find Minimum in Rotated Sorted Array
140. Basic Calculator II
141. Combination Sum IV
142. Insert Delete GetRandom O(1)
143. Non-overlapping Intervals

Hards Start Here

144. Minimum Window Substring
145. Serialize and Deserialize Binary Tree
146. Trapping Rain Water
147. Find Median from Data Stream
148. Word Ladder
149. Basic Calculator
150. Maximum Profit in Job Scheduling
151. Merge k Sorted Lists
152. Largest Rectangle in Histogram
153. Binary Tree Maximum Path Sum
154. Maximum Frequency Stack
155. Median of Two Sorted Arrays
156. Longest Increasing Path in a Matrix
157. Longest Valid Parentheses
158. Design In-Memory File System
159. Employee Free Time

Week 8

160. Word Search II
161. Alien Dictionary
162. Bus Routes
163. Sliding Window Maximum
164. Palindrome Pairs
165. Reverse Nodes in k-Group
166. Sudoku Solver
167. First Missing Positive
168. N-Queens
169. Smallest Range Covering Elements from K Lists