Title Difficulty Companies Videos
Busiest period in a building Easy amazon
Grid Game Medium
Sort a linked list in O(n log n) time and constant space Medium google
Implement a 2D iterator class Medium uber
Length of the longest path in a weighted tree Hard uber
First Completely Painted Row or Column Medium
Minimum Cost to Make at Least One Valid Path in a Grid Hard google
Neighboring Bitwise XOR Medium
Bitwise XOR of All Pairings Medium
Minimize XOR Medium
Generate random numbers from list based on given probabilities Medium triplebyte
Sort a list using reverse sublist operation Hard
Find the Prefix Common Array of Two Arrays Medium
Minimum Length of String After Operations Medium
Check if a Parentheses String Can Be Valid Medium
Construct K Palindrome Strings Medium uber
Word Subsets Medium amazon facebook google
Find nearest larger number for index in an array Medium google
Counting Words With a Given Prefix Easy
Implement 3 stacks in 1 list Hard microsoft
Implement a bit array Medium amazon
Count Prefix and Suffix Pairs 1 Easy
Design a Sparse Array Easy facebook
String Matching in an Array Easy amazon
Minimum Number of Operations to Move All Balls to Each Box Medium
Design hit counter with range queries Easy riot-games
Square root of a real number Medium
Shifting Letters II Medium
Check if target word exists in matrix horizontally or vertically Easy microsoft
Break a string into lines of length k without breaking words Medium amazon
Expected number of rounds to reach one remaining coin Easy microsoft
Maximum coins from top-left to bottom-right with right or down moves Medium zillow
Smallest set to cover all intervals Medium google microsoft
Number of Ways to Split Array Medium
Generate a finite, but an arbitrarily large binary tree in O(1) time Medium jane-street
Find all starting indices of anagrams of a word in a string Hard
Count Vowel Strings in Ranges Medium
Best Sightseeing Pair Medium wayfair
Find Largest Value in Each Tree Row Problem Medium amazon apple facebook linkedin microsoft
Check if one can reach the last index in a list of hops starting with index 0 Medium pinterest
Check if doubly linked list is palindrome Easy google
Shortest substring containing all characters in a set Medium square
Return two prime numbers that sum to a given even number Easy alibaba
Find Minimum Diameter After Merging Two Trees Hard
Minimum Number of Operations to Sort a Binary Tree by Level Medium
Maximum Number of K-Divisible Components Hard
Reverse Odd Levels of Binary Tree Problem Medium
Final Prices With a Special Discount in a Shop Easy
Construct String With Repeat Limit Medium
Final Array State After K Multiplication Operations 1 Problem Easy