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algorithm_practice's Introduction

Algorithm Practice

idx name category from answer note
0 Merging meeting times array Interview Cake A +
1 Reverse array in place array Interview Cake A +
2 Reverse words array Interview Cake A -
3 Merge sorted array array Interview Cake A -
4 Single riffle check array Interview Cake A +
5 Longest substring string LeetCode A -
6 Container with most water array LeetCode A -
7 Three sum array LeetCode A !
8 Inflight entertainment hash Interview Cake A +!
9 Unique string string CTCI 1.1 A +
10 Check permutation string CTCI 1.2 A +
11 Urlify string CTCI 1.3 A -
12 Palindrome permutation string CTCI 1.4 A +
13 One away string CTCI 1.5 A +
14 String compression string CTCI 1.6 A +
15 Rotate matrix array CTCI 1.7 A +
16 Set matrix zeros array CTCI 1.8 A !
17 String rotation string CTCI 1.9 A !
18 Remove duplicates linked list LeetCode A !
19 Remove nth from end linked list LeetCode A +
20 Delete node linked list LeetCode A +
21 Partition list linked list LeetCode A +
22 Add two numbers linked list LeetCode A +
23 Palindrome linked list LeetCode A !
24 Intersection linked list LeetCode A !
25 Loop detection linked list LeetCode A +
26 Next permutation array LeetCode A -!
27 Multiply Strings string LeetCode A +
28 Jump Game array LeetCode A -
29 Plus One array LeetCode A +
30 Minimum window substring string LeetCode A !!
31 Longest Valid Parentheses string LeetCode A -
32 Trapping rain water array LeetCode A -!
33 Valid parentheses string LeetCode A +
34 basic calculator string leetcode A -
35 decode string string leetcode A -!
36 min stack array leetcode A +!
37 queue using stacks array leetcode A +
38 odd even jumps array leetcode A !
39 task scheduler array leetcode A !
40 merge two sorted lists linked list leetcode A +
41 K closest points to origin heap leetcode A +!
42 Merge K sorted lists heap leetcode A +!
43 Kth largest element heap leetcode A +!
44 Find Median from Data Stream heap leetcode A -!
45 Two sum hash leetcode A ++!
46 Group Anagrams hash leetcode A -!
47 Subarray Sum Equals K hash leetcode A -
48 Palindrome Pairs hash leetcode A !
49 Copy List with Random Pointer hash leetcode A +!
50 Insert Delete GetRandom O(1) hash leetcode A +
51 Backspace String Compare string leetcode A +-
52 Maximal Rectangle array leetcode A -
53 Read N char given read4 array leetcode A +
54 Longest Substring with At Most Two Distinct Characters array leetcode A +
55 Simplify Path string leetcode A +
56 Serialize and Deserialize Binary Tree tree leetcode A -
57 Binary Tree Maximum Path Sum tree leetcode A +
58 Binary Tree Zigzag Level Order Traversal tree leetcode A +
59 Validate Binary Search Tree tree leetcode A -
60 Serialize and Deserialize BST tree leetcode A -
61 Binary Tree Right Side View tree leetcode A +
62 Lowest Common Ancestor of a Binary Tree tree leetcode A -
63 Symmetric Tree tree leetcode A +!
64 Jewels and Stones hash leetcode A +
65 Find Duplicate File in System hash leetcode A +
66 Subdomain Visit Count hash leetcode A +
67 Sliding Window Maximum heap leetcode A +!
68 Clone Graph graph leetcode A +
69 Course Schedule graph leetcode A -
70 Course Schedule2 graph leetcode A -
71 Reconstruct Itinerary graph leetcode A -
72 Evaluate Division graph leetcode A -
73 Network Delay Time graph leetcode A -
74 Is Graph Bipartite graph leetcode A +
75 Binary Tree Level Order Traversal tree leetcode A +
76 Subsets bit manipulation leetcode A +
77 Single Number bit manipulation leetcode A +
78 Single Number2 bit manipulation leetcode A +?
79 Majority Element bit manipulation leetcode A -
80 Bitwise AND of Numbers Range bit manipulation leetcode A ++!-
81 Missing Number bit manipulation leetcode A +!
82 Sum of Two Integers bit manipulation leetcode A !
83 UTF-8 Validation bit manipulation leetcode A !
84 Minimum Height Trees graph leetcode A !
85 Reverse Integer math leetcode A +
86 Palindrome Number math leetcode A +
87 Divide Two Integers math leetcode A !
88 Happy Number math leetcode A +!
89 Count Primes math leetcode A +!
90 Perfect Squares math leetcode A -
91 Least Operators to Express Number math leetcode A !
92 Power of Two bit manipulation leetcode A !
93 Longest Palindromic Substring dynamic programming leetcode A !
94 Maximum Subarray dynamic programming leetcode A +!
95 Minimum Path Sum dynamic programming leetcode A +
96 Climbing Stairs dynamic programming leetcode A +
97 Decode Ways dynamic programming leetcode A +
98 Best Time to Buy and Sell Stock dynamic programming leetcode A +
99 Word Break dynamic programming leetcode A -!
100 Coin Change dynamic programming leetcode A +
101 Cherry Pickup dynamic programming leetcode A !
102 Ugly Number II math leetcode A !
103 Regular Expression Matching dynamic programming leetcode A ?
104 Median of Two Sorted Arrays binary search leetcode A +!
105 Search in Rotated Sorted Array binary search leetcode A !
106 Merge Intervals sort leetcode A +
107 Time Based Key-Value Store binary search leetcode A !!
108 Split Array Largest Sum binary search leetcode A !
109 Reorder Data in Log Files string leetcode A +
110 Product of Array Except Self array leetcode A !
111 Game of Life array leetcode A !
112 Generate Parentheses array leetcode A +
113 Letter Combinations of a Phone Number string leetcode A +
114 First Missing Positive array leetcode A +-
115 Move Zeroes array leetcode A ++-
116 Word Search array leetcode A -
117 Spiral Matrix array leetcode A +
118 4Sum hash leetcode A -
119 Top K Frequent Elements hash leetcode A +!
120 Verifying an Alien Dictionary hash leetcode A +
121 Longest String Chain hash leetcode A +
122 Sudoku Solver hash leetcode A +
123 Swap Nodes in Pairs linked list leetcode A +
124 Reverse Linked List linked list leetcode A +
125 Add two numbers 2 linked list leetcode A --
126 Reverse Nodes in k-Group linked list leetcode A -
127 Sort List linked list leetcode A !
128 BST Iterator tree (stack) leetcode A -
129 House Robber dp leetcode A +
130 Maximal Square dp leetcode A -
131 Palindromic Substring dp leetcode A +
132 Combination Sum dp leetcode A -!
133 Maximum product subarray dp leetcode A -!
134 Longest increasing subsquence dp leetcode A +
135 Restore IP Addresses dp leetcode A +
136 Minimum Cost Tree From Leaf Values dp leetcode A -!
137 N-Queens dp leetcode A +
138 Unique BST tree leetcode A !
139 Construct Binary Tree from Preorder and Inorder Traversal tree leetcode A !
140 Count Complete Tree Nodes tree leetcode A +!
141 Subtree of Another Tree tree leetcode A +!
142 All Nodes Distance K in Binary Tree tree leetcode A !
143 Diameter of Binary Tree tree leetcode A +
144 Recover Binary Search Tree tree leetcode A +-!
145 Keys and Rooms graph leetcode A +
146 Find the town judge graph leetcode A ++
147 Redundant Connection graph leetcode A -!
148 Regions Cut By Slashes graph leetcode A -!
149 Couples Holding Hands graph leetcode A -!
150 Similar String Groups graph leetcode A -!
151 Longest Substring Without Repeating Characters hash leetcode A +
152 Arranging Coins search leetcode A ++-!
153 Binary Tree Level Order Traversal II tree leetcode A +
154 Prison Cells After N Days bit manipulation leetcode A +!
155 Hamming Distance bit manipulation leetcode A +
156 Island Perimeter array leetcode A +
157 Reverse words in a string string leetcode A +
158 pow_x_n math leetcode A +
159 Remove Linked List Elements linked list leetcode A +
160 Add binary math leetcode A +
161 Power of four math leetcode A +
162 Add and Search Word tree leetcode A -
163 Find all duplicates in an array array leetcode A +!!
164 Vertical Order Traversal of a Binary Tree tree leetcode A +
165 Rotting Oranges array leetcode A +
166 Excel Sheet Column Number string leetcode A +
167 Path Sum iii tree leetcode A !
168 H-Index array leetcode A +++
169 Pascal's Triangle ii array leetcode A ++!
170 Iterator for combination string leetcode A +
171 Longest Palindrome string leetcode A +
172 Non-Overlapping Intervals array leetcode A -!
173 Best Time to Buy and Sell Stock 3 dp leetcode A !
174 Distribute candies to people array leetcode A !
175 Numbers With Same Consecutive Differences array leetcode A +
176 Sum of left leaves tree leetcode A +
177 Sort array by parity array leetcode a +
178 Goat Latin string leetcode a +
179 Fizz Buzz array leetcode a +
180 Count Unique Characters of All Substrings of a Given String string leetcode a !
181 Minimum Cost For Tickets dp leetcode a !
182 Find Right Interval search leetcode a !
183 Implement Rand10() Using Rand7() math leetcode a !
184 Delete Node in a BST tree leetcode a !
185 Majority Element II array leetcode a +
186 Find the difference array leetcode a +
187 Insert into a Binary Search Tree tree leetcode a +
188 House Robber II dp leetcode a !
189 Rotate Array array leetcode a +!
190 Search a 2D Matrix array leetcode a +
191 Repeated DNA Sequences string leetcode a +
192 Best Time to Buy and Sell Stock IV dp leetcode a !
193 Minimum Domino Rotations For Equal Row array leetcode a +
194 Clone Graph graph leetcode a +
195 Asteroid Collision array leetcode a +
196 Minimum Depth of Binary Tree tree leetcode a +
197 Linked List Cycle II linked list leetcode a +!
198 Summary Ranges array leetcode a +
199 Maximize Distance to Closest Person array leetcode a -!
200 Third Maximum Number array leetcode a +
201 Find Lucky Integer in an Array array leetcode a +
202 Check Array Formation Through Concatenation array leetcode a +
203 Count Sorted Vowel Strings dp leetcode a +
204 Furthest Building You Can Reach heap leetcode a !
205 Kth Smallest Instructions dp leetcode a !
206 Get Maximum in Generated Array dp leetcode a +
207 Minimum Deletions to Make Character Frequencies Unique string leetcode a +
208 Sell Diminishing-Valued Colored Balls array leetcode a !
209 Create Sorted Array through Instructions array leetcode a !
210 Check If Two String Arrays are Equivalent string leetcode a +!
211 Smallest String With A Given Numeric Value string leetcode a !
212 Richest Customer Wealth array leetcode a +
213 Find the Most Competitive Subsequence array leetcode a -
214 Count of Matches in Tournament math leetcode a +
215 Partitioning Into Minimum Number Of Deci-Binary Numbers math leetcode a +
216 Stone Game VII array leetcode a !

+: Solved within 30 min

-: Solved over 30 min

!: Got help from the solution

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