[Programming Problem] Largest Number

Given a list of non-negative integers nums, arrange them such that they form the largest number and return it.   Since the result may...

[Programming Problem] Sum Root to Leaf Numbers

You are given the root of a binary tree containing digits from 0 to 9 only.   Each root-to-leaf path in the tree represents...

[Programming Problem] Reverse Linked List II

Given the head of a singly linked list and two integers left and right where left <= right, reverse the nodes of the list...

[Programming Problem] Jump Game II

Given an array of non-negative integers nums, you are initially positioned at the first index of the array. Each element in the array represents...

[Programming Problem] Find Minimum in Rotated Sorted Array II

Suppose an array of length n sorted in ascending order is rotated between 1 and n times. For example, the array nums = [0,1,4,4,5,6,7]...

[Programming Problem] Find Minimum in Rotated Sorted Array

Suppose an array of length n sorted in ascending order is rotated between 1 and n times. For example, the array nums = [0,1,2,4,5,6,7]...

[Programming Problem] Print FooBar Alternately

Suppose you are given the following code: class FooBar { public void foo() { for (int i = 0; i < n; i++) {...

[Programming Problem] The Dining Philosophers

[Problem Link] Solution here is to add some `ordering` on the resources (i.e. forks) requested by the processes (i.e. the philosophers). Identify the resource...

[Programming Problem] Surrounded Regions

Given an m x n matrix board containing ‘X’ and ‘O’, capture all regions that are 4-directionally surrounded by ‘X’. A region is captured...

[Programming Problem] K Closest Points to Origin

Given an array of points where points[i] = [xi, yi] represents a point on the X-Y plane and an integer k, return the k...