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import { accessSync, promises as fs } from 'fs'; | |
(async()=>{ | |
const input = await fs.readFile("./interpretertests/aoc_21_4_input.txt", 'utf8')+'\n' | |
const lines = input.split('\n') | |
const draw = lines[0].split(',').map(Number) | |
const boards = lines.slice(1).reduce((acc, line)=>{ | |
if (line.trim().length==0) { | |
if (acc.current.length>0) { | |
acc.boards.push(acc.current) | |
acc.current = [] | |
} | |
return acc | |
} | |
const numbers = line.split(' ').filter(v=>v.trim().length>0).map(Number).map(v=>[v, false]) | |
acc.current.push(numbers) | |
return acc | |
}, {boards: [], current: []}) | |
// # 1 | |
for(const d of draw) { | |
boards.boards.forEach(b=>b.forEach(n=>n.filter(v=>v[0] == d).forEach(v=>v[1]=true))); | |
const winner = boards.boards.filter( | |
b=> | |
b.filter(n=>n.every(v=>v[1])).length>0 | |
|| | |
b[0].map((val, index)=>b.map(row => row[index]).reverse()).filter(n=>n.every(v=>v[1])).length>0 | |
)[0] | |
if (winner) { | |
console.table(winner) | |
console.log(winner.flatMap(r=>r.filter(v=>!v[1]).map(v=>v[0])).reduce((acc, cur) => acc + cur, 0) * d) | |
break; | |
} | |
} | |
// # 2 | |
boards.boards.forEach(b=>b.forEach(n=>n.forEach(v=>v[1]=false))); // reset boards | |
let lastWinners = [] | |
let winners = [] | |
for(const d of draw) { | |
lastWinners = winners | |
boards.boards.forEach(b=>b.forEach(n=>n.filter(v=>v[0] == d).forEach(v=>v[1]=true))); | |
winners = boards.boards.filter( | |
b=> | |
b.filter(n=>n.every(v=>v[1])).length>0 | |
|| | |
b[0].map((val, index)=>b.map(row => row[index]).reverse()).filter(n=>n.every(v=>v[1])).length>0 | |
).map(b=>boards.boards.indexOf(b)) | |
if (winners.length == boards.boards.length) { | |
const winner = boards.boards[winners.filter(v=>!lastWinners.includes(v))[0]] | |
console.table(winner) | |
console.log(winner.flatMap(r=>r.filter(v=>!v[1]).map(v=>v[0])).reduce((acc, cur) => acc + cur, 0) * d) | |
break; | |
} | |
} | |
})() |
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