Problem Statement (Asked By Stripe) You are given an array of integers. Your task is to find the smallest missing…

Problem Statement (Asked By Jane Street) The function cons(a, b) creates a pair of two elements. Implement two functions: For…

An XOR-linked list is a memory-efficient version of a doubly linked list. Instead of each node storing separate next and…

Problem Statement (Asked By Facebook) Given the mapping a = 1, b = 2, …, z = 26, and an…

A unival tree (short for "universal value tree") is a tree in which all nodes have the same value. Given…

Problem Statement (Asked By Airbnb) Given a list of integers, write a function to compute the largest sum of numbers…

Design a job scheduler that accepts a function f and an integer n. The scheduler should execute the function f…

Build an autocomplete system that, given a query string s and a set of possible query strings returns all strings…

There is a staircase with N steps, and you can ascend either 1 step or 2 steps at a time….

Given an integer k and a string s, write a function to determine the length of the longest substring in…

The formula for the area of a circle is given by πr². Use the Monte Carlo method to approximate the…

You are given a stream of elements that is too large to fit into memory. Write an algorithm to select…