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tvl-depot/assessments/semiprimes
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William Carroll 8c5e4e77ed Expose functions at API layer 
Creating a simple HTTP RESTful API for exposing our `Server.semiprime`
function. It supports some help messages, primitive parsing and error handling,
and singular vs. batch processing of arguments.

For more sophisticated parsing and error-checking, I prefer to use Haskell's
Servant library.
2020-12-12 02:43:40 +00:00
..
server Expose functions at API layer 2020-12-12 02:43:40 +00:00
default.nix Define stubbed default.nix 2020-12-11 22:43:53 +00:00
README.md Expand 10^5 in README 2020-12-12 02:41:09 +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 less than 100,000
  • 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?