Day22 Part1

This commit is contained in:
Karl Spickermann 2022-12-22 16:51:39 +01:00
parent 6cbca15c3d
commit 86f941e5d7
3 changed files with 357 additions and 0 deletions

141
day22/day22.go Normal file

@ -0,0 +1,141 @@
package main
import (
"AOC2022/helper"
"fmt"
"strconv"
"strings"
)
func main() {
//args := os.Args[1:]
lines := helper.ReadTextFile("day22/input")
field := [][]rune{}
for _, line := range lines {
if line == "" {
break
}
field = append(field, []rune(line))
}
commandsLine := lines[len(lines)-1]
commandsLine = strings.ReplaceAll(commandsLine, "R", "R,")
commandsLine = strings.ReplaceAll(commandsLine, "L", "L,")
commands := strings.Split(commandsLine, ",")
currentPosition := [3]int{0, 0, 0}
for i, c := range field[0] {
if c == '.' {
currentPosition[1] = i
break
}
}
fmt.Println(currentPosition)
for _, command := range commands {
fmt.Println(command)
currentPosition = runCommand(field, command, currentPosition)
fmt.Println(currentPosition)
}
fmt.Println(currentPosition)
fmt.Println(1000*(currentPosition[0]+1) + 4*(currentPosition[1]+1) + currentPosition[2])
}
func runCommand(field [][]rune, command string, currentPosition [3]int) [3]int {
rotation := command[len(command)-1]
if rotation < 57 {
rotation = 0
} else {
command = command[:len(command)-1]
}
distance := helper.RemoveError(strconv.Atoi(command))
currentPosition = move(field, currentPosition, distance)
if rotation == 'R' {
newDirection := currentPosition[2] + 1
if newDirection > 3 {
newDirection = 0
}
currentPosition[2] = newDirection
}
if rotation == 'L' {
newDirection := currentPosition[2] - 1
if newDirection < 0 {
newDirection = 3
}
currentPosition[2] = newDirection
}
return currentPosition
}
func getDirection(currentPosition [3]int) [2]int {
directions := [][2]int{{0, 1}, {1, 0}, {0, -1}, {-1, 0}}
return directions[currentPosition[2]]
}
func move(field [][]rune, currentPosition [3]int, distance int) [3]int {
direction := getDirection(currentPosition)
for i := 0; i < distance; i++ {
tmpPosition := [2]int{currentPosition[0], currentPosition[1]}
tmpPosition[0] += direction[0]
tmpPosition[1] += direction[1]
check := checkPosition(field, tmpPosition)
if check == 2 {
break
}
if check == 1 {
currentPosition = loop(field, currentPosition)
}
if check == 0 {
currentPosition[0] = tmpPosition[0]
currentPosition[1] = tmpPosition[1]
}
}
return currentPosition
}
//2 - Collision
//1 - Out Of Bounds
//0 - Fine
func checkPosition(field [][]rune, position [2]int) int {
if position[0] >= len(field) || position[0] < 0 {
return 1
}
if position[1] >= len(field[position[0]]) || position[1] < 0 {
return 1
}
switch field[position[0]][position[1]] {
case ' ':
return 1
case '.':
return 0
case '#':
return 2
}
return -1
}
func loop(field [][]rune, currentPosition [3]int) [3]int {
direction := getDirection(currentPosition)
newStartPosition := [2]int{0, 0}
if direction[0] == 0 {
newStartPosition[0] = currentPosition[0]
}
if direction[0] < 0 {
newStartPosition[0] = len(field) - 1
}
if direction[1] == 0 {
newStartPosition[1] = currentPosition[1]
}
if direction[1] < 0 {
newStartPosition[1] = len(field[newStartPosition[0]]) - 1
}
for checkPosition(field, newStartPosition) == 1 {
newStartPosition[0] += direction[0]
newStartPosition[1] += direction[1]
}
if checkPosition(field, newStartPosition) == 0 {
currentPosition[0] = newStartPosition[0]
currentPosition[1] = newStartPosition[1]
}
return currentPosition
}

202
day22/input Normal file

File diff suppressed because one or more lines are too long

14
day22/testinput Normal file

@ -0,0 +1,14 @@
...#
.#..
#...
....
...#.......#
........#...
..#....#....
..........#.
...#....
.....#..
.#......
......#.
10R5L5R10L4R5L5