Advent-of-Code/2021/day1/main.go

package main

import (
	"fmt"
)

func main() {
	data := LoadData("./data")
	c := CountIncreases(&data)
	fmt.Println(c)
	data = MutateDataPart2(data)
	c = CountIncreases(&data)
	fmt.Println(c)
}

func MutateDataPart2(data []DataEntry) []DataEntry {
	var result []DataEntry
	lastInt := 0
	for i := range data {
		if i >= len(data)-2 {
			continue
		}
		value := data[i].Value + data[i+1].Value + data[i+2].Value
		var status Status
		switch {
		case lastInt == 0:
			status = Nothing
		case lastInt < value:
			status = Increased
		case lastInt > value:
			status = Decreased
		case lastInt == value:
			status = Equal
		}
		lastInt = value
		result = append(result, DataEntry{
			Value:  value,
			Status: status,
		})
	}
	return result
}

func CountIncreases(d *[]DataEntry) int {
	var count int
	for _, d := range *d {
		if d.Status == Increased {
			count++
		}
	}
	return count
}

func checkErr(err error) {
	if err != nil {
		fmt.Println(err)
	}
}