Advent of Code 2022 - Day 1: Calorie Counting Solution

Part 1

Calculate the total calories carried by each Elf

Implementation

1const fs = require("fs")
2
3const data = fs.readFileSync("./input", "utf-8").split(/\r?\n/)
4
5const SEPARATOR = ""
6
7const aggregatedData = data.reduce(
8  (acc, el) => {
9    if (el === SEPARATOR) {
10      acc.totalCarries.push(acc.sum)
11      acc.sum = 0
12    } else {
13      acc.sum += Number(el)
14    }
15
16    return acc
17  },
18  { totalCarries: [], sum: 0 }
19)
20
21const res = Math.max(...aggregatedData.totalCarries)
22
23console.log(res)

Part 2

Same as Part 1, with additional steps

• take aggregatedData.totalCarries
• sort descending
• take the first 3 value
• calculate sum

Implementation

1const fs = require("fs")
2
3const data = fs.readFileSync("./input", "utf-8").split(/\r?\n/)
4
5const SEPARATOR = ""
6
7const aggregatedData = data.reduce(
8  (acc, el) => {
9    if (el === SEPARATOR) {
10      acc.totalCarries.push(acc.sum)
11      acc.sum = 0
12    } else {
13      acc.sum += Number(el)
14    }
15
16    return acc
17  },
18  { totalCarries: [], sum: 0 }
19)
20
21const res = aggregatedData.totalCarries
22  .sort((a, b) => b - a)
23  .slice(0, 3)
24  .reduce((acc, el) => acc + el, 0)
25
26console.log(res)

References

Original problem