Category: algorithm and data structures

This problem was asked by Stripe. Given an array of integers, find the first missing positive integer in linear time…

This problem was asked by Jane Street. cons(a, b) constructs a pair, and car(pair) and cdr(pair) returns the first and last element of that pair.…

This problem was asked by Uber. Given an array of integers, return a new array such that each element at…

This problem was recently asked by Google. Given a list of numbers and a number k, return whether any two…