Problem Set
Practice coding problems to improve your skills
Two Sum
Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.
ArrayHash Table
49.2%
1247
AmazonGoogle+1
Very High
Binary Tree Inorder Traversal
Given the root of a binary tree, return the inorder traversal of its nodes' values.
TreeStackHash Table
74.1%
892
FacebookApple+1
High
Merge k Sorted Lists
You are given an array of k linked-lists lists, each linked-list is sorted in ascending order.
Linked ListDivide and ConquerHeap
47.8%
2156
GoogleAmazon+2
High