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560 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
Amount of New Area Painted Each Day	hard	-
Arrange Given Number To Form The Biggest Number Possible	medium	-	uber
Array With Elements Not Equal to Average of Neighbors	medium	-
Brace Expansion	medium	-
Can Make Palindrome from Substring	medium	-
Car Pooling	medium	-
Check if Intervals Overlap	easy	-
Choose K Elements With Maximum Sum	medium	-
Circus tower sorting	medium	-
Count Covered Buildings	medium	-
Count frequency of target element in sorted array	medium	-
Count Mentions Per User	medium	-
Eat Pizzas!	medium	-
Hotel Reviews	medium	-	booking
3Sum0 - Find three elements in an array that sum to a zero	medium		adobe akuna-capital alibaba
3Sum - Closest	medium	-	adobe amazon apple
4Sum	medium	-	adobe amazon apple
Kth Smallest Element in an Array	medium	-
Letter Tile Possibilities	medium		google microsoft
Maximize Profit from Task Assignment	medium	-
Maximum Alternating Subsequence Sum	medium	-
Maximum and Minimum Sums of at Most Size K Subsequences	medium	-
Maximum Area Rectangle With Point Constraints I	medium	-
Maximum Area Rectangle With Point Constraints II	hard	-
Maximum Coins From K Consecutive Bags	medium	-
Maximum Number of Matching Indices After Right Shifts	easy	-
Maximum Product of Two Digits	easy	-
Maximum Product of Two Elements in an Array	easy	-
Maximum Score of Non-overlapping Intervals	hard	-
Maximum Sum of Edge Values in a Graph	hard	-
Maximum Sum With at Most K Elements	medium	-
Merge Sort Algorithm	easy
Merge Sort in a Linked list	medium	-
Minimum Cost to Make Arrays Identical	medium	-
Minimum Cost Tree From Leaf Values	medium	-
Minimum Deletions for At Most K Distinct Characters	easy	-
Minimum Difference Between Highest and Lowest of K Scores	easy	-
Number of Overlapping Lines between points on 2 parallel lines	easy	-	amazon facebook
Path Existence Queries in a Graph II	hard	-
Path With Minimum Effort	medium	-
Phone Number Prefix	easy	-
Process Tasks Using Servers	medium	-
Searching in a sorted array of strings with empty strings	medium	-
Select K Disjoint Special Substrings	medium	-
Smallest Palindromic Rearrangement I	medium	-
Smallest String With Swaps	medium	-
Sort a nearly sorted K sorted array	medium	-	palantir
Sort Array - Odds Ascending and Before Evens Descending	easy	-
Sort Strings by Anagram Key	medium	-
Sorting a 2GB file with one string per line	medium	-

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