mdebray/tvl-depot
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
tvl-depot/assessments/semiprimes
History
William Carroll 714ec29743 Define Cache and convert app to OTP 
Define a simple in-memory key-value store for our cache.

TL;DR:
- Define `Cache` as a simple state-keeping `Agent`
- Define `Sup`, which starts our Cache process
- Define `App`, which starts our Supervisor process
- Whitelist `App` in `mix.exs`, so that it starts after calling `iex -S mix`
2020-12-12 01:04:39 +00:00
..
server Define Cache and convert app to OTP 2020-12-12 01:04:39 +00:00
default.nix Define stubbed default.nix 2020-12-11 22:43:53 +00:00
README.md Initialize the Semiprimes Service 2020-12-11 18:52:35 +00:00

README.md

Semiprimes Service

Introduction

A composite is a number containing at least two prime factors. For example:

15 = 3 × 5
9 = 3 × 3
12 = 2 × 2 × 3

There are ten composites below thirty containing precisely two, not necessarily distinct, prime factors: 4, 6, 9, 10, 14, 15, 21, 22, 25, 26. Let’s call such numbers Semiprimes.

Task

  • Write a module which provides a function to tell whether a given number, N, is a semiprime. N will be 10^5.
  • Please implement an API (RESTful or GraphQL) to factor a given number into two prime numbers if it’s a semiprime, otherwise, return an error message.

Stretch Goals

  • Handle the invalid inputs.
  • Support batch requests: i.e. users could provide 100 numbers, and the API return the answer for all.
  • Considering this module will be used by a long running service, could you optimize it to give answers faster?