Coding Interview

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2024

2023

703. Kth Largest Element in a Stream 30 Dec
1650. Lowest Common Ancestor of a Binary Tree III 28 Dec
1668. Maximum Repeating Substring 01 Dec
1877. Minimize Maximum Pair Sum in Array 17 Nov
1492. The kth Factor of n 22 Oct
2278. Percentage of Letter in String 22 Sep
1812. Determine Color of a Chessboard Square 22 Sep
1055. Shortest Way to Form String 20 Sep
1198. Find Smallest Common Element in All Rows 01 Sep
338. Counting Bits 20 Aug
1100. Find K-Length Substrings With No Repeated Characters 19 Aug
270. Closest Binary Search Tree Value 15 Aug
1429. First Unique Number 13 Aug
744. Find Smallest Letter Greater Than Target 10 Aug
18. 4Sum 10 Aug
2408. Design SQL 04 Aug
249. Group Shifted Strings 02 Aug
1165. Single-Row Keyboard 01 Aug
990. Satisfiability of Equality Equations 30 Jul
1056. Confusing Number 29 Jul
734. Sentence Similarity 26 Jul
384. Shuffle an Array 25 Jul
1426. Counting Elements 24 Jul
616. Add Bold Tag in String 24 Jul
213. House Robber II 23 Jul
238. Product of Array Except Self 21 Jul
108. Convert Sorted Array to Binary Search Tree 21 Jul
1644. Lowest Common Ancestor of a Binary Tree II 21 Jul
1133. Largest Unique Number 19 Jul
2330. Valid Palindrome IV 18 Jul
2486. Append Characters to String to Make Subsequence 18 Jul
25. Reverse Nodes in k-Group 17 Jul
191. Number of 1 Bits 17 Jul
2422. Merge Operations to Turn Array Into a Palindrome 16 Jul
161. One Edit Distance 15 Jul
937. Reorder Data in Log Files 14 Jul
2405. Optimal Partition of String 14 Jul
1014. Best Sightseeing Pair 14 Jul
1272. Remove Interval 13 Jul
130. Surrounded Regions 11 Jul
572. Subtree of Another Tree 11 Jul
1091. Shortest Path in Binary Matrix 11 Jul
653. Two Sum IV - Input is a BST 10 Jul
713. Subarray Product Less Than K 09 Jul
700. Search in a Binary Search Tree 09 Jul
986. Interval List Intersections 09 Jul
701. Insert into a Binary Search Tree 09 Jul
438. Find All Anagrams in a String 08 Jul
144. Binary Tree Preorder Traversal 08 Jul
145. Binary Tree Postorder Traversal 08 Jul
844. Backspace String Compare 08 Jul
129. Sum Root to Leaf Numbers 07 Jul
112. Path Sum 07 Jul
101. Symmetric Tree 05 Jul
437. Path Sum III 05 Jul
36. Valid Sudoku 04 Jul
190. Reverse Bits 04 Jul
566. Reshape the Matrix 04 Jul
203. Remove Linked List Elements 04 Jul
83. Remove Duplicates from Sorted List 04 Jul
190. Reverse Bits 04 Jul
346. Moving Average from Data Stream 30 Jun
1474. Delete N Nodes After M Nodes of a Linked List 30 Jun
994. Rotting Oranges 29 Jun
350. Intersection of Two Arrays II 29 Jun
567. Permutation in String 28 Jun
100. Same Tree 27 Jun
617. Merge Two Binary Trees 27 Jun
226. Invert Binary Tree 27 Jun
733. Flood Fill 27 Jun
217. Contains Duplicate 27 Jun
422. Valid Word Square 26 Jun
266. Palindrome Permutation 26 Jun
876. Middle of the Linked List 26 Jun
54. Spiral Matrix 25 Jun
93. Restore IP Addresses 25 Jun
Top 7 Coding Interview Patterns 25 Jun
Top 7 Coding Interview Data Structure 25 Jun
Advanced Coding Interview Patterns 25 Jun
1101. The Earliest Moment When Everyone Become Friends 24 Jun
977. Squares of a Sorted Array 24 Jun
557. Reverse Words in a String III 24 Jun
86. Partition List 23 Jun
487. Max Consecutive Ones II 23 Jun
19. Remove Nth Node From End of List 22 Jun
82. Remove Duplicates from Sorted List II 22 Jun
278. First Bad Version 21 Jun
435. Non-overlapping Intervals 20 Jun
186. Reverse Words in a String II 19 Jun
163. Missing Ranges 19 Jun
760. Find Anagram Mappings 19 Jun
1137. N-th Tribonacci Number 18 Jun
211. Design Add and Search Words Data Structure 18 Jun
141. Linked List Cycle 16 Jun
290. Word Pattern 14 Jun
151. Reverse Words in a String 14 Jun
205. Isomorphic Strings 14 Jun
373. Find K Pairs with Smallest Sums 14 Jun
383. Ransom Note 13 Jun
219. Contains Duplicate II 13 Jun
2130. Maximum Twin Sum of a Linked List 11 Jun
1539. Kth Missing Positive Number 11 Jun
918. Maximum Sum Circular Subarray 10 Jun
57. Insert Interval 10 Jun
280. Wiggle Sort 09 Jun
64. Minimum Path Sum 09 Jun
14. Longest Common Prefix 08 Jun
58. Length of Last Word 08 Jun
235. Lowest Common Ancestor of a Binary Search Tree 07 Jun
111. Minimum Depth of Binary Tree 06 Jun
2215. Find the Difference of Two Arrays 06 Jun
254. Factor Combinations 06 Jun
2352. Equal Row and Column Pairs 06 Jun
1657. Determine if Two Strings Are Close 06 Jun
1456. Maximum Number of Vowels in a Substring of Given Length 05 Jun
230. Kth Smallest Element in a BST 05 Jun
1431. Kids With the Greatest Number of Candies 04 Jun
1427. Perform String Shifts 03 Jun
752. Open the Lock 03 Jun
35. Search Insert Position 02 Jun
74. Search a 2D Matrix 02 Jun
189. Rotate Array 02 Jun
209. Minimum Size Subarray Sum 02 Jun
169. Majority Element 02 Jun
1603. Design Parking System 01 Jun
1493. Longest Subarray of 1's After Deleting One Element 31 May
740. Delete and Earn 31 May
605. Can Place Flowers 31 May
886. Possible Bipartition 30 May
452. Minimum Number of Arrows to Burst Balloons 30 May
17. Letter Combinations of a Phone Number 30 May
785. Is Graph Bipartite? 30 May
222. Count Complete Tree Nodes 30 May
1868. Product of Two Run-Length Encoded Arrays 29 May
530. Minimum Absolute Difference in BST 29 May
1858. Longest Word With All Prefixes 29 May
159. Longest Substring with At Most Two Distinct Characters 29 May
340. Longest Substring with At Most K Distinct Characters 29 May
106. Construct Binary Tree from Inorder and Postorder Traversal 29 May
1901. Find a Peak Element II 28 May
1182. Shortest Distance to Target Color 27 May
2095. Delete the Middle Node of a Linked List 27 May
1207. Unique Number of Occurrences 26 May
933. Number of Recent Calls 26 May
637. Average of Levels in Binary Tree 25 May
1823. Find the Winner of the Circular Game 24 May
901. Online Stock Span 23 May
875. Koko Eating Bananas 23 May
724. Find Pivot Index 23 May
1244. Design A Leaderboard 23 May
863. All Nodes Distance K in Binary Tree 23 May
542. 01 Matrix 23 May
345. Reverse Vowels of a String 22 May
323. Number of Connected Components in an Undirected Graph 22 May
1236. Web Crawler 21 May
1614. Maximum Nesting Depth of the Parentheses 21 May
1071. Greatest Common Divisor of Strings 21 May
153. Find Minimum in Rotated Sorted Array 21 May
658. Find K Closest Elements 21 May
92. Reverse Linked List II 20 May
2390. Removing Stars From a String 20 May
694. Number of Distinct Islands 20 May
2390. Removing Stars From a String 20 May
463. Island Perimeter 20 May
134. Gas Station 20 May
1732. Find the Highest Altitude 20 May
314. Binary Tree Vertical Order Traversal 20 May
71. Simplify Path 19 May
274. H-Index 19 May
167. Two Sum II - Input Array Is Sorted 18 May
228. Summary Ranges 18 May
26. Remove Duplicates from Sorted Array 18 May
80. Remove Duplicates from Sorted Array II 18 May
624. Maximum Distance in Arrays 18 May
366. Find Leaves of Binary Tree 18 May
1325. Delete Leaves With a Given Value 18 May
212. Word Search II 17 May
140. Word Break II 17 May
443. String Compression 17 May
643. Maximum Average Subarray I 17 May
166. Fraction to Recurring Decimal 16 May
171. Excel Sheet Column Number 16 May
271. Encode and Decode Strings 16 May
402. Remove K Digits 15 May
4. Median of Two Sorted Arrays 15 May
456. 132 Pattern 14 May
399. Evaluate Division 13 May
723. Candy Crush 13 May
Simulation 13 May
1768. Merge Strings Alternately 12 May
611. Valid Triangle Number 11 May
13. Roman to Integer 11 May
532. K-diff Pairs in an Array 11 May
1105. Filling Bookcase Shelves 11 May
133. Clone Graph 11 May
311. Sparse Matrix Multiplication 10 May
73. Set Matrix Zeroes 10 May
117. Populating Next Right Pointers in Each Node II 10 May
12. Integer to Roman 10 May
448. Find All Numbers Disappeared in an Array 10 May
714. Best Time to Buy and Sell Stock with Transaction Fee 10 May
309. Best Time to Buy and Sell Stock with Cooldown 10 May
454. 4Sum II 10 May
Best Time to Buy and Sell Stock 10 May
981. Time Based Key-Value Store 09 May
69. Sqrt(x) 09 May
81. Search in Rotated Sorted Array II 09 May
1114. Print in Order 09 May
50. Pow(x, n) 09 May
1498. Number of Subsequences That Satisfy the Given Sum Condition 09 May
341. Flatten Nested List Iterator 09 May
369. Plus One Linked List 08 May
31. Next Permutation 08 May
503. Next Greater Element II 08 May
1151. Minimum Swaps to Group All 1's Together 08 May
72. Edit Distance 08 May
122. Best Time to Buy and Sell Stock II 08 May
797. All Paths From Source to Target 08 May
16. 3Sum Closest 08 May
496. Next Greater Element I 07 May
390. Elimination Game 07 May
24. Swap Nodes in Pairs 06 May
116. Populating Next Right Pointers in Each Node 06 May
239. Sliding Window Maximum 04 May
239. Sliding Window Maximum 04 May
1047. Remove All Adjacent Duplicates In String 03 May
1584. Min Cost to Connect All Points 03 May
978. Longest Turbulent Subarray 03 May
835. Image Overlap 03 May
652. Find Duplicate Subtrees 03 May
993. Cousins in Binary Tree 03 May
451. Sort Characters By Frequency 02 May
328. Odd Even Linked List 02 May
325. Maximum Size Subarray Sum Equals k 02 May
387. First Unique Character in a String 02 May
295. Find Median from Data Stream 02 May
390. Elimination Game 02 May
250. Count Univalue Subtrees 02 May
445. Add Two Numbers II 02 May
451. Sort Characters By Frequency 02 May
Union Find 02 May
344. Reverse String 01 May
1004. Max Consecutive Ones III 01 May
179. Largest Number 01 May
28. Find the Index of the First Occurrence in a String 01 May
287. Find the Duplicate Number 01 May
1756. Design Most Recently Used Queue 01 May
729. My Calendar I 30 Apr
236. Lowest Common Ancestor of a Binary Tree 30 Apr
232. Implement Queue using Stacks 30 Apr
297. Serialize and Deserialize Binary Tree 29 Apr
268. Missing Number 29 Apr
1060. Missing Element in Sorted Array 29 Apr
1143. Longest Common Subsequence 29 Apr
378. Kth Smallest Element in a Sorted Matrix 29 Apr
392. Is Subsequence 29 Apr
67. Add Binary 29 Apr
44. Wildcard Matching 26 Apr
692. Top K Frequent Words 26 Apr
560. Subarray Sum Equals K 26 Apr
136. Single Number 26 Apr
260. Single Number III 26 Apr
146. LRU Cache 26 Apr
97. Interleaving String 26 Apr
202. Happy Number 26 Apr
543. Diameter of Binary Tree 26 Apr
199. Binary Tree Right Side View 26 Apr
Bit Manipulation 26 Apr
528. Random Pick with Weight 25 Apr
66. Plus One 25 Apr
1319. Number of Operations to Make Network Connected 25 Apr
32. Longest Valid Parentheses 24 Apr
114. Flatten Binary Tree to Linked List 24 Apr
746. Min Cost Climbing Stairs 23 Apr
118. Pascal's Triangle 22 Apr
695. Max Area of Island 22 Apr
102. Binary Tree Level Order Traversal 22 Apr
1209. Remove All Adjacent Duplicates in String II 21 Apr
967. Numbers With Same Consecutive Differences 21 Apr
150. Evaluate Reverse Polish Notation 21 Apr
1209. Remove All Adjacent Duplicates in String II 21 Apr
79. Word Search 20 Apr
96. Unique Binary Search Trees 20 Apr
160. Intersection of Two Linked Lists 20 Apr
380. Insert Delete GetRandom O(1) 20 Apr
41. First Missing Positive 20 Apr
139. Word Break 19 Apr
148. Sort List 19 Apr
252. Meeting Rooms 19 Apr
1469. Find All The Lonely Nodes 19 Apr
1029. Two City Scheduling 18 Apr
1347. Minimum Number of Steps to Make Two Strings Anagram 18 Apr
253. Meeting Rooms II 18 Apr
1169. Invalid Transactions 18 Apr
430. Flatten a Multilevel Doubly Linked List 18 Apr
1472. Design Browser History 18 Apr
430. Flatten a Multilevel Doubly Linked List 18 Apr
8. String to Integer (atoi) 17 Apr
10. Regular Expression Matching 17 Apr
283. Move Zeroes 17 Apr
98. Validate Binary Search Tree 16 Apr
242. Valid Anagram 16 Apr
75. Sort Colors 16 Apr
155. Min Stack 16 Apr
56. Merge Intervals 16 Apr
152. Maximum Product Subarray 16 Apr
104. Maximum Depth of Binary Tree 16 Apr
739. Daily Temperatures 16 Apr
11. Container With Most Water 16 Apr
173. Binary Search Tree Iterator 16 Apr
138. Copy List with Random Pointer 13 Apr
103. Binary Tree Zigzag Level Order Traversal 13 Apr
437. Path Sum III 12 Apr
21. Merge Two Sorted Lists 12 Apr
198. House Robber 12 Apr
22. Generate Parentheses 12 Apr
187. Repeated DNA Sequences 11 Apr
9. Palindrome Number 11 Apr
1229. Meeting Scheduler 11 Apr
662. Maximum Width of Binary Tree 11 Apr
394. Decode String 11 Apr
105. Construct Binary Tree from Preorder and Inorder Traversal 11 Apr
39. Combination Sum 11 Apr
42. Trapping Rain Water 10 Apr
61. Rotate List 10 Apr
582. Kill Process 10 Apr
322. Coin Change 10 Apr
23. Merge k Sorted Lists 09 Apr
128. Longest Consecutive Sequence 09 Apr
2. Add Two Numbers 09 Apr
90. Subsets II 08 Apr
162. Find Peak Element 08 Apr
207. Course Schedule 31 Mar
210. Course Schedule II 31 Mar
214. Shortest Palindrome 25 Feb
124. Binary Tree Maximum Path Sum 23 Feb
121. Best Time to Buy and Sell Stock 22 Feb
78. Subsets 21 Feb
33. Search in Rotated Sorted Array 21 Feb
46. Permutations 21 Feb
547. Number of Provinces 21 Feb
88. Merge Sorted Array 21 Feb
53. Maximum Subarray 21 Feb
3. Longest Substring Without Repeating Characters 21 Feb
215. Kth Largest Element in an Array 21 Feb
55. Jump Game 21 Feb
509. Fibonacci Number 21 Feb
70. Climbing Stairs 21 Feb
20. Valid Parentheses 20 Feb
125. Valid Palindrome 20 Feb
1. Two Sum 20 Feb
206. Reverse Linked List 20 Feb
200. Number of Islands 20 Feb
49. Group Anagrams 20 Feb
94. Binary Tree Inorder Traversal 20 Feb
Top 7 Coding Interview Concepts (Data Structures & Algorithms) 18 Feb
String 10 Feb
Coding Interview Data Structure 07 Feb
Sliding Window 06 Feb
Two Pointers 17 Jan

Coding Interview

2024

2023

2019

Kyun