aoc21_7.js

import { accessSync, promises as fs } from 'fs';



(async()=>{
    const input = await fs.readFile("./interpretertests/aoc_21_7_input.txt", 'utf8')

    const positions = input.split('\n')[0].split(',').map(Number) 

    const max = Math.max(...positions)

    let horizontals = positions.reduce((acc, cur) => { acc[cur] = 0; return acc }, [])
    
    let min = 900719925474099
    for(let h in horizontals) {
        for(let i of positions) {
            horizontals[h] += Math.abs(i-h)
        }
        if (horizontals[h]<min)
            min = horizontals[h]
    }
    console.table(min)
    
    const sum = (n) => {
        return ((n+1)*n)/2
    }

    min = 900719925474099
    horizontals = [...Array(max)].map(x=>0)
    for(let h in horizontals) {
        for(let i of positions) {
            horizontals[h] += sum(Math.abs(i-h))
        }
        if (horizontals[h]<min)
            min = horizontals[h]
    }
    console.table(min)
})()