| Run a Markov chain and count state visits |
Easy
|
google
|
|
| Flatten a nested dictionary |
Easy
|
stripe
|
|
| Busiest period in a building |
Easy
|
amazon
|
|
| Counting Words With a Given Prefix |
Easy
|
|
|
| Count Prefix and Suffix Pairs 1 |
Easy
|
|
|
| Design a Sparse Array |
Easy
|
facebook
|
|
| String Matching in an Array |
Easy
|
amazon
|
|
| Design hit counter with range queries |
Easy
|
riot-games
|
|
| Check if target word exists in matrix horizontally or vertically |
Easy
|
microsoft
|
|
| Expected number of rounds to reach one remaining coin |
Easy
|
microsoft
|
|
| Check if doubly linked list is palindrome |
Easy
|
google
|
|
| Return two prime numbers that sum to a given even number |
Easy
|
alibaba
|
|
| Final Prices With a Special Discount in a Shop |
Easy
|
|
|
| Final Array State After K Multiplication Operations 1 Problem |
Easy
|
|
|
| Take Gifts From the Richest Pile |
Easy
|
|
|
| Duplicate each node in a binary search tree and add as its left child |
Easy
|
|
|
| Find a Corresponding Node of a Binary Tree in a Clone of That Tree |
Easy
|
facebook
|
|
| Find GCD of n numbers |
Easy
|
amazon
|
|
| Maximum in a Binary Search Tree |
Easy
|
|
|
| Maximum in a Binary Tree |
Easy
|
|
|
| Min Queue Problem |
Easy
|
|
|
| Minimum in a Binary Search Tree |
Easy
|
|
|
| Print or return all the full nodes in a binary tree |
Easy
|
|
|
| Range Sum Query - Immutable |
Easy
|
amazon
bloomberg
facebook
goldman-sachs
google
microsoft
palantir-technologies
|
|
| Return or print all leaf nodes of a binary tree |
Easy
|
|
|
| Search an element in a binary tree |
Easy
|
|
|
| Add Two Integers |
Easy
|
|
|
| Allow One Function Call |
Easy
|
|
|
| Array Prototype ForEach |
Easy
|
|
|
| Array Wrapper |
Easy
|
|
|
| Average Selling Price |
Easy
|
amazon
|
|
| Average Time of Process per Machine |
Easy
|
|
|
| Base 7 |
Easy
|
bloomberg
google
|
|
| Binary Number with Alternating Bits |
Easy
|
yahoo
|
|
| Calculate Money in Leetcode Bank |
Easy
|
|
|
| Calculator with Method Chaining |
Easy
|
|
|
| Categorize Box According to Criteria |
Easy
|
|
|
| Cells with Odd Values in a Matrix |
Easy
|
|
|
| Check if Binary String Has at Most One Segment of Ones |
Easy
|
|
|
| Check if Bitwise OR Has Trailing Zeros |
Easy
|
|
|
| Check if Every Row and Column Contains All Numbers |
Easy
|
|
|
| Check if Matrix Is X-Matrix |
Easy
|
|
|
| Check If N and Its Double Exist |
Easy
|
google
|
|
| Check if Two Chessboard Squares Have the Same Color |
Easy
|
|
|
| Chunk Array |
Easy
|
|
|
| Classifying Triangles by Lengths |
Easy
|
|
|
| Construct the Minimum Bitwise Array I |
Easy
|
|
|
| Convert Date Format |
Easy
|
|
|
| Convert Doubly Linked List to Array I |
Easy
|
|
|
| Convert the Temperature |
Easy
|
|
|