2018 d7 p2

2018/7/part2.js

@@ -0,0 +1,38 @@
+const fs = require('fs');
+let rules = fs.readFileSync('input.txt', 'utf-8').split('\n');
+steps = {};
+for (let rule of rules) {
+	[_, step1, step2] = rule.match(/Step (\w) must be finished before step (\w) can begin./);
+	if (!steps[step1])
+		steps[step1] = []
+	if (!steps[step2])
+		steps[step2] = []
+	steps[step2].push(step1)
+}
+
+let elves = {};
+for (let time = 0; Object.entries(steps).length > 0; time++) {
+	if (elves[time]) {
+		console.log(`step ${elves[time]} done`)
+		remove(elves[time])
+		delete elves[time];
+	}
+	let avaliable = Object.entries(steps).filter(v => v[1].length == 0).map(v => v[0]).sort();
+	for (let i = 0; Object.entries(elves).length < 5 && i < avaliable.length; i++) {
+		if (!Object.values(elves).some(v => v == avaliable[i])) {
+			elves[time + timeof(avaliable[i])] = avaliable[i]
+		}
+	}
+	console.log(time, Object.values(elves))
+}
+
+function timeof(step) {
+	return 60 + '0ABCDEFGHIJKLMNOPQRSTUVWXYZ'.indexOf(step)
+}
+
+function remove(step) {
+	delete steps[step];
+	for (let s in steps) {
+		steps[s] = steps[s].filter(v => v != step)
+	}
+}

2018/README.md

@@ -22,4 +22,4 @@
 1. [:star: :star:](https://adventofcode.com/2018/day/4 "see puzzle")
 1. [:star: :star:](https://adventofcode.com/2018/day/5 "see puzzle")
 1. [:star: :star:](https://adventofcode.com/2018/day/6 "see puzzle")
-1. [:star:](https://adventofcode.com/2018/day/7 "see puzzle")
+1. [:star: :star:](https://adventofcode.com/2018/day/7 "see puzzle")

README.md

@@ -23,9 +23,9 @@ if (advent) {
 1. [js  :star: :star:](https://adventofcode.com/2015/day/4 "see puzzle")
 1. [js  :star: :star:](https://adventofcode.com/2015/day/5 "see puzzle")
 1. [js  :star: :star:](https://adventofcode.com/2015/day/6 "see puzzle")
-1. [js  :star:](https://adventofcode.com/2015/day/7 "see puzzle")
+1. [js  :star: :star:](https://adventofcode.com/2015/day/7 "see puzzle")
 1. [-](https://adventofcode.com/2015/day/8 "see puzzle")
 
 ## Languages Used
 * Python 8×:star:
-* Node JS 13×:star:
+* Node JS 14×:star: