solve

2022 advent day 10

Problem is basically keeping track of a running sum.

package problems

import (
	"fmt"
	"strings"

	"github.com/sooflee/advent/internal"
)

type day10 struct {
	lines []string
}

func Day10(part int, file string) int {

	in := day10{
		lines: internal.Read(file),
	}

	switch part {
	case 1:
		return in.part_one()
	case 2:
		return in.part_two()
	default:
		return 0
	}

}

func update_signal_strength(signal_strength *int, cycle_number int, curr_X int) {
	if cycle_number%40 == 20 {
		curr_strength := curr_X * cycle_number
		*signal_strength = *signal_strength + curr_strength
	}
}

func (input day10) part_one() int {
	curr_X := 1
	cycle_number := 0
	signal_strength := new(int)
	*signal_strength = 0

	for _, line := range input.lines {

		if line == "noop" {
			cycle_number++
			update_signal_strength(signal_strength, cycle_number, curr_X)

		} else {
			cycle_number++
			update_signal_strength(signal_strength, cycle_number, curr_X)

			cycle_number++
			update_signal_strength(signal_strength, cycle_number, curr_X)

			parsed := strings.Split(line, " ")
			curr_X = curr_X + internal.StrToInt(parsed[1])
		}
	}
	return *signal_strength
}

func mark_output(output *[240]string, curr_X int, cycle_number int) *[240]string {
	if cycle_number > 239 || cycle_number < 0 {
		return output
	}
	if cycle_number%40 == curr_X-1 || cycle_number%40 == curr_X || cycle_number%40 == curr_X+1 {
		output[cycle_number] = "#"
	} else {
		output[cycle_number] = "."
	}
	return output
}

func print_output(output *[240]string) {
	for i := 0; i < 6; i++ {
		fmt.Println(output[i*40 : (i+1)*40-1])
	}
}

func (input day10) part_two() int {
	curr_X := 1
	cycle_number := 0
	output := new([240]string)
	curr_X_arr := [240]int{}

	for _, line := range input.lines {

		if line == "noop" {
			cycle_number++
			curr_X_arr[cycle_number-1] = curr_X

		} else {
			cycle_number++
			curr_X_arr[cycle_number-1] = curr_X

			cycle_number++
			curr_X_arr[cycle_number-1] = curr_X

			parsed := strings.Split(line, " ")
			curr_X = curr_X + internal.StrToInt(parsed[1])
		}
	}

	for i, curr_X_val := range curr_X_arr {
		output = mark_output(output, curr_X_val, i)
	}

	print_output(output)
	return 0
}