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18 problems total

Array (174)Sorting (45)Depth First Search (44)Tree (41)Breadth First Search (35)Linked List (28)Stack (27)Recursion (18)Graph Theory (12)Monotonic Stack (8)Queue (6)Shortest Path (2)

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Title	Difficulty	Videos	Companies
Two Sum	easy		adobe aetion affirm
Longest Substring Without Repeating Characters	medium		adobe alation alibaba
3Sum0 - Find three elements in an array that sum to a zero	medium		adobe akuna-capital alibaba
Valid Parentheses	easy		adobe airbnb akuna-capital
Search in Rotated Sorted Array	medium		adobe alibaba amazon
Maximum Subarray Sum	medium		adobe alibaba amazon
Set Matrix Zeros	medium		adobe amazon apple
Decode Ways	medium		adobe amazon apple
Binary Tree Level Order Traversal - Level by Level	medium		adobe amazon apple
Best Time To Buy And Sell Stock 1 - only one transaction	easy		adobe akuna-capital alibaba
2Sum 2 – Input array is sorted	medium		amazon apple bloomberg
House Robber	medium		adobe airbnb amazon
Number of Islands	medium		adobe affirm alibaba
Valid Anagram	easy		amazon apple bloomberg
Serialize and Deserialize Binary Tree	hard		amazon apple bloomberg
Sum of Left Leaves	easy		adobe amazon bloomberg
Uncommon Words from Two Sentences	easy		amazon expedia facebook
Subarray Sums Divisible by K	medium		amazon bytedance expedia