aoc2022-day2.go

package main

import (
	"bufio"
	"fmt"
	"os"
)

func algorithm1(lines []string) int {

	sum := 0

	winPoints := 6
	drawPoints := 3
	losePoints := 0

	rockPoints := 1
	paperPoints := 2
	scissorPoints := 3

	for _, line := range lines {
		switch line {
		case "A X":
			sum += rockPoints + drawPoints
		case "A Y":
			sum += paperPoints + drawPoints
		case "A Z":
			sum += scissorPoints + losePoints
		case "B X":
			sum += rockPoints + losePoints
		case "B Y":
			sum += paperPoints + drawPoints
		case "B Z":
			sum += scissorPoints + winPoints
		case "C X":
			sum += rockPoints + winPoints
		case "C Y":
			sum += paperPoints + losePoints
		case "C Z":
			sum += scissorPoints + drawPoints
		}
	}

	return sum
}

func algorithm2(lines []string) int {

	sum := 0

	winPoints := 6
	drawPoints := 3
	losePoints := 0

	rockPoints := 1
	paperPoints := 2
	scissorPoints := 3

	for _, line := range lines {
		switch line {
		case "A X":
			sum += scissorPoints + losePoints
		case "A Y":
			sum += rockPoints + drawPoints
		case "A Z":
			sum += paperPoints + winPoints
		case "B X":
			sum += rockPoints + losePoints
		case "B Y":
			sum += paperPoints + drawPoints
		case "B Z":
			sum += scissorPoints + winPoints
		case "C X":
			sum += paperPoints + losePoints
		case "C Y":
			sum += scissorPoints + drawPoints
		case "C Z":
			sum += rockPoints + winPoints
		}
	}

	return sum
}

func main() {

	lines := []string{}

	readFile, err := os.Open("day2.txt")

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

	fileScanner := bufio.NewScanner(readFile)

	fileScanner.Split(bufio.ScanLines)

	for fileScanner.Scan() {
		lines = append(lines, fileScanner.Text())
	}

	println(len(lines))

	fmt.Println(fmt.Sprintf("Solution 1: %d", algorithm1(lines)))
	fmt.Println(fmt.Sprintf("Solution 2: %d", algorithm2(lines)))

	readFile.Close()
}