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4301 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
Find the smallest subarray with a sum greater than a given integer	medium	-
Find Time Required to Eliminate Bacterial Strains	hard	-
Find two repeating elements in a given ranged array	medium	-
Find Unique Binary String	medium
Find Valid Emails	easy	-
Find Valid Pair of Adjacent Digits in String	easy	-
Find Vertical Sum in binary Tree	medium	-
Find X Value of Array I	medium	-
Find X Value of Array II	hard	-
Finding N-th Smallest Sum from Two Sorted Arrays	medium	-	microsoft
Finding the Critical Point in a Mountain or Valley-Shaped Array	medium	-
Finding the Maximum Distance Between Increasing Elements in an Array	medium	-
Finding the most frequent element in an array of numbers from 0 to n-1	medium	-
First Duplicate Character in a String	easy	-
First duplicate element in an array by its index	easy	-
First Letter Capitalization II	hard	-
First negative number in every window of size k or w	easy	-
First Unique Character in a Stream of Characters	medium	-	amazon google microsoft
First Unique element in an array	easy	-
Fisher-Yates Shuffle	medium	-	facebook
Fisher-Yates Shuffle vs Reservoir Sampling	medium	-
Fix the variable capture in closure	medium	-	google
Flatten a Multi-Level Linked List in Depth-first way	medium	-
Flatten a Multi-Level Linked List level by level	medium	-	facebook
Flatten a nested dictionary	easy	-	stripe
Flatten Binary Search Tree to Circular Doubly Linked List	medium	-
Flatten binary search tree to sorted linked list	medium	-
Flatten Binary tree to double linked list in-place	medium	-
Flatten binary tree to linked list in order of inorder traversal	medium	-
Floyd Cycle-Finding Algorithm	medium	-
Floyd-Warshall Algorithm	medium	-
Fractional knapsack problem	medium	-
Freivald’s Algorithm to check if a matrix is product of two	medium	-
Frequencies of Shortest Supersequences	hard	-
Fruits Into Baskets II	easy	-
Fruits Into Baskets III	medium	-
Game of Master Mind	medium	-
Generate 0 and 1 with 25% and 75% Probability Using a Fair Coin	medium	-
Generate a finite, but an arbitrarily large binary tree in O(1) time	medium	-	jane-street
Generate All Strings of n bits	medium	-
Generate one of 3 numbers according to given probabilities	medium	-
Generate random numbers from list based on given probabilities	medium	-	triplebyte
Get sqrt nth node in Linked List	medium	-
Ghost Word Game Winning Strategy	hard	-	two-sigma
Given a binary search tree with 2 nodes swapped find number of pairs not following BST properties	easy	-
Given an array count max number of surpassers	medium	-
Given menu item with price and budget, get all possible combinations of menu items	medium	-	reddit
Given preorder traversal of a BST, check if each non-leaf node has only one child	medium	-
Good vs Bad Hash function examples	medium	-
Graph Representation - Adjacency List (with isDirected)	medium	-

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