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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)

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Title	Difficulty	Videos	Companies
Count Sorted Vowel Strings	medium	-
Determine whether two lines would intersect on a Cartesian plane	easy	-
Dot Product of 2 Sparse Vectors	medium	-
Find a line to cut two squares in half	easy	-
Find a line which passes the most number of points	medium	-
Implement multiplication, subtraction, and division using only addition	medium	-
Reverse Integer	medium	-	adobe amazon apple
Palindrome Number	easy		adobe amazon apple
Lazy Caterer's sequence	medium	-
Numbers Of Length N and Values Less Than K	hard	-	google
Rearranging Array Elements by Index Mapping	medium	-	facebook
Simulating an Unbiased Coin Toss Using a Biased Coin	medium	-	square
Implement Power Function 1	medium	-	adobe amazon apple
Unique Paths in Grid 1 - Count all paths moving right or down	medium		adobe alibaba amazon
Maximum Points on a Line	hard	-	amazon apple bloomberg
Rectangle Area - Total area of two rectangles	medium	-	apple facebook microsoft
Missing Number	easy		adobe amazon apple
Power of Three	easy	-	apple goldman-sachs google
Integer Break	medium	-	adobe apple google
Minimum Moves to Equal Array Elements	medium	-	amazon apple coursera
Perfect number	easy	-	amazon fallible
Continuous Subarray Sum	medium		amazon bytedance facebook
Fraction Addition and Subtraction	medium		goldman-sachs ixl
Valid Square	medium	-	facebook google pure-storage
Range Addition 2	easy	-	ixl
Maximum Swap	medium		amazon apple bytedance
K closest Points to Origin	medium	-	amazon apple asana
Valid Boomerang	easy	-	google
Prime Arrangements	easy	-	amazon
Minimum Cost to Move Chips to The Same Position	easy	-	morgan-stanley
Water Bottles	easy	-	microsoft
Find Missing Observations	medium