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67 problems total

Array (1905)Sorting (440)Depth First Search (316)Database (301)Breadth First Search (241)Tree (240)Stack (172)Graph Theory (169)Linked List (81)Monotonic Stack (67)Queue (50)Recursion (48)Shortest Path (33)

All Topics(4301)Database(305)Networking(0)Object Oriented Design(31)Programming Languages(5)System Design(0)Algorithms(3944)

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Title	Difficulty	Videos	Companies
Create Sorted Array through Instructions	hard	-
External Sorting of integers	medium	-	amazon
Fill a Special Grid	medium	-
Find Unique Binary String	medium
Median of Two Sorted Arrays	hard	-	adobe airbnb alibaba
Kth Smallest Element in an Array	medium	-
Maximum Number of Matching Indices After Right Shifts	easy	-
Merge K Sorted Lists	hard		adobe airbnb alibaba
Minimum and Maximum in an array with Optimal Comparisons	medium	-	facebook
Minimum Difference Between Highest and Lowest of K Scores	easy	-
Maximum Subarray Sum	medium		adobe alibaba amazon
Construct Binary Tree from Inorder and Preorder Traversal	medium		adobe amazon apple
Construct Binary Tree from Inorder and Postorder Traversal	medium	-	amazon bloomberg facebook
Convert Sorted Array to height-balanced Binary Search Tree	easy		airbnb amazon apple
Convert Sorted List into a height-balanced Binary search Tree	medium	-	amazon bloomberg facebook
Sort a Linked List	medium	-	adobe amazon bytedance
Majority Element - Boyer–Moore majority vote algorithm	easy	-	adobe amazon apple
Reverse Bits	easy		airbnb amazon apple
Number of 1 Bits	easy		adobe amazon apple
Kth Largest Element in an Array	medium	-	adobe airbnb alibaba
Skyline Problem	hard	-	adobe amazon apple
Search a 2D Matrix 2 - Rows and columns are sorted	medium	-	adobe amazon apple
Count of Smaller Numbers After Self	hard	-	adobe amazon apple
Wiggle Sort 2 - No Adjacent Duplicates	medium	-	airbnb akuna-capital facebook
Count of Range Sum	hard	-	google
Top K Frequent Elements	medium		amazon apple bloomberg
Super Pow	medium	-
Longest Substring with At Least K Repeating Characters	medium	-	adobe amazon baidu
Construct Quad Tree	medium	-	amazon apple google
Reverse Pairs	hard	-	amazon bytedance google
Logical OR of Two Binary Grids Represented as Quad-Trees	medium	-	amazon google sumologic
Maximum Binary Tree	medium	-	amazon facebook google
Basic Calculator 3	hard	-	amazon apple bytedance
Construct Binary Tree from Preorder and Postorder Traversal	medium	-	amazon bloomberg facebook
Sort an array	medium		amazon apple bloomberg
Maximum Sum Circular Subarray	medium	-	amazon facebook two-sigma
Beautiful Array	medium	-	google
K closest Points to Origin	medium	-	amazon apple asana
Number of Ways to Stay in the Same Place After Some Steps	hard	-	facebook google
Number of Ships in a Rectangle	hard	-	bloomberg
Balance a Binary Search Tree	medium		amazon
Number of Ways to Reorder Array to Get Same BST	hard	-
Find the Highest Altitude	easy	-
Find Kth Largest XOR Coordinate Value	medium	-
Count Number of Homogenous Substrings	medium	-
Longest Nice Substring	easy	-
Find Array Given Subset Sums	hard	-
Find the Kth Largest Integer in the Array	medium	-
Smallest K-Length Subsequence With Occurrences of a Letter	hard	-
Count Subarrays With More Ones Than Zeros	medium	-

Showing 1 to 50 of 67 results