sharparam.com
Code for the Advent of Code event
aoc
advent-of-code
1#!/usr/bin/env ruby
2# frozen_string_literal: true
3
4SIZE = 25
5NUMS = ARGF.readlines.map(&:to_i).freeze
6
7part1 = NUMS[SIZE..].find.with_index { |n, i|
8 ri = i + SIZE
9 NUMS[ri - SIZE...ri].combination(2).none? { _1 + _2 == n }
10}.tap { puts _1 }
11
12puts (2..).lazy.map { |s|
13 NUMS.each_cons(s).find { _1.sum == part1 }
14}.find { _1 }.then { _1.min + _1.max }