From 12e65157e2011efe54d1af8532890ec9617ab69c Mon Sep 17 00:00:00 2001 From: Yanick Champoux Date: Fri, 10 Dec 2021 13:35:49 -0500 Subject: [PATCH] working! --- 2021/10/part1.mjs | 42 ++++++++++++++++++++++++++++++++++++++++-- 2021/10/part2.mjs | 38 +++++++++++++++++++++++++++++++++++++- 2021/10/sample | 10 ++++++++++ 2021/10/test.mjs | 11 +++++++---- 4 files changed, 94 insertions(+), 7 deletions(-) create mode 100644 2021/10/sample diff --git a/2021/10/part1.mjs b/2021/10/part1.mjs index 2027f1d..adb6152 100644 --- a/2021/10/part1.mjs +++ b/2021/10/part1.mjs @@ -2,7 +2,45 @@ import fs from "fs-extra"; import fp from "lodash/fp.js"; import _ from "lodash"; -export const processInput = (input) => input; +export const processInput = (file) => fs.readFile(file,'utf8').then( + content => content.split("\n").filter(x=>x).map( + line => line.split('') + ) +); + +export const closing = { + '{':'}', + '<': ">", + '(': ')', + '[': ']', +}; + +function firstIllegalCharacter(line) { + const stack = []; + + for ( const c of line ) { + if( closing[c] ) { + stack.push(closing[c]); + } else { + if(c !== stack.pop()) return c; + } + } + + return ''; -export function solution(input) { +} + +export function solution(lines) { + const points = { + ')': 3, + ']': 57, + '}': 1197, + '>': 25137, + } + + return _.sum( + lines.map( firstIllegalCharacter ).map( + c => points[c] || 0 + ) + ) } diff --git a/2021/10/part2.mjs b/2021/10/part2.mjs index 4581168..2029fc8 100644 --- a/2021/10/part2.mjs +++ b/2021/10/part2.mjs @@ -4,5 +4,41 @@ import _ from "lodash"; import * as p1 from './part1.mjs'; -export function solution(input) { +function completionString(line) { + const stack = []; + + for ( const c of line ) { + if( p1.closing[c] ) { + stack.unshift(p1.closing[c]); + } else { + if(c !== stack.shift()) return; + } + } + + return stack; + +} + +export function linesScore(lines) { + lines = lines.map( completionString ).filter(x=>x); + + const points = { + ')': 1, + ']': 2, + '}': 3, + '>': 4, + } + + const lineScore = line => line.reduce( (a,b) => 5*a + points[b], 0 ); + + return lines.map(lineScore); +} + +export function solution(lines) { + + const scores =linesScore(lines); + + scores.sort( (a,b) => a[[{[]{<()<>> +[(()[<>])]({[<{<<[]>>( +{([(<{}[<>[]}>{[]{[(<()> +(((({<>}<{<{<>}{[]{[]{} +[[<[([]))<([[{}[[()]]] +[{[{({}]{}}([{[{{{}}([] +{<[[]]>}<{[{[{[]{()[[[] +[<(<(<(<{}))><([]([]() +<{([([[(<>()){}]>(<<{{ +<{([{{}}[<[[[<>{}]]]>[]] diff --git a/2021/10/test.mjs b/2021/10/test.mjs index 0f62c0d..cc49669 100644 --- a/2021/10/test.mjs +++ b/2021/10/test.mjs @@ -10,11 +10,14 @@ const sample = p1.processInput('sample'); const input = p1.processInput('input'); tap.test("part1", async (t) => { - t.equal(p1.solution(await sample), 0); -// t.equal(p1.solution(await input), 0); + t.equal(p1.solution(await sample), 26397); + t.equal(p1.solution(await input), 311949); }); tap.test("part2", async (t) => { - // t.equal(p2.solution(await sample), 0); - // t.equal(p2.solution(await input), 0); + t.match(p2.linesScore(await sample), [ + 288957, 5566, 1480781, 995444, 294 + ]); + t.equal(p2.solution(await sample), 288957); + t.equal(p2.solution(await input), 3042730309); });