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1086 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
Add one to a number without using plus or minus sign	easy	-
All Permutations of a String 3 in Lexicographic Order	easy	-
Area of intersection of two rectangles	easy	-	google
Assign Mice To Holes	easy	-	amazon
Avoid Overflow when calculating Mid in Binary Search	easy	-
Balanced delimiters in an expression	easy	-	uber
Binary Tree Path Sum - Minimum Sum Root to Leaf path	easy	-	apple
BST Floor and Ceiling	easy	-	oracle
Busiest period in a building	easy	-	amazon
Button with Longest Push Time	easy	-
Calculate floor of Log2n without using built-in function	easy	-
Calculating the mean and median of an unsorted array	easy	-	uber
Capturing Loop Variables in Lambdas	easy	-	dropbox
Check if an Array of Integers is Sorted	easy	-
Check if an element exists in a binary tree	easy	-
Check if any pair of rectangles overlap	easy	-	google
Check if Array Contains All Elements Of Some Given Range	easy	-
Check if Array is Consecutive Positive Integers	easy	-
Check If Digits Are Equal in String After Operations I	easy	-
Check if doubly linked list is palindrome	easy	-	google
Check if given string is palindrome or not	easy
Check if given undirected graph is connected	easy	-
Check if Intervals Overlap	easy	-
Check if ith bit is set in a 32 bit integer	easy	-
Check if number is odd or even	easy	-
Check if target word exists in matrix horizontally or vertically	easy	-	microsoft
Check if two given matrices are identical	easy	-
Clear the n-th bit	easy	-
Climbing Stairs - Take atmost 3 steps	easy	-
Closest pair of points	easy	-	google
Collatz Sequence	easy	-	apple
Contains Duplicate 4 - Check if array contains duplicates given ranged array	easy	-
Count all divisors of a natural number	easy	-
Count Binary Strings Without Consecutive 1s	easy	-
Count Employees per department	easy	-
Count number of ways to fill an n x 4 grid using 1 x 4 tiles	easy	-
Count of Pairs of Squares Summing to N Squared	easy	-
Count Pairs with Given Sum and XOR	easy	-	jane-street
Count Partitions with Even Sum Difference	easy	-
Count Squares on a Chessboard	easy	-
Count Subarrays of Length Three With a Condition	easy	-
Count the divisors of a given number	easy	-
Create a word with a single 0-bit at the position of the rightmost 1-bit	easy	-
Create a word with a single 1-bit at the position of the rightmost 0-bit	easy	-
Crossword Grid Validation	easy	-	palantir
Decrypt Word with cumulative ASCII shift	easy	-
Design a Database for Storing Students' Grades	easy	-
Design a Sparse Array	easy	-	facebook
Design hit counter with range queries	easy	-	riot-games
Design log Order records	easy	-	twitter amazon

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