116 lines
4.1 KiB
Swift
116 lines
4.1 KiB
Swift
let input = """
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UULLULLUULLLURDLDUURRDRRLDURDULLRURDUDULLLUULURURLRDRRRRULDRUULLLLUUDURDULDRRDRUDLRRLDLUDLDDRURURUURRRDDDLLRUDURDULUULLRRULLRULDUDRDRLDLURURUDDUDLURUDUDURLURURRURLUDDRURRDLUURLLRURRDUDLULULUDULDLLRRRDLRDLDUDRDDDRRUURRRRRUURRDRRDLURDRRURDLLUULULLRURDLDDDRRLLRRUURULURUUDDLRRUDDRURUUDLRLRDLRURRRDULLDLRUDDUULRDULURUURDULUDLLRRLDDLRDLRUDRLDDRLRRRDURDULLRRRDRRLUURURDRRDRRLDLUDURURLDUURDRUDRDDRLDRRLDLURURULLUURUDUUDLRLL
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LLLULLULDDULRLLURLLLRUUDDLRUULRLULLDLLRRDRLRLRLLDRUUURULDRDDLUDLLDUDULLLRLULLLRULDRDRUDLLRLRLLUDULRRRLDRUULDDULLDULULLUDUDLDRDURDLDLLDUDRRRDLUURRUURULLURLDURLRRLLDDUUULDRLUUDUDLURLULUDURRDRLLDDDDDRRULLRLDULULDDRUURRDLUDDDUDURDDRDRULULLLLUURDURUUUULUDLRURRULRDDRURURLLRLUUDUUURDLLDDLUDRLLLUDLLLLULRLURDRRRDUUDLLDLDDDURRDDRURUURDDRURRLDDDURDLLUURUUULRLUURRUDRLLDLURDUDRLULDLRLULULUDDLRDUDRUDLUULUULDURDRRRRLRULLUDRDDRDLDUDRDRRLDLLLLUDDLRULDLLDDUULDDRRULRRUURUDRDURLLLDDUUDRUUDLULLDR
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UDUUULLDDDDLUDLDULRLRDLULLDDRULDURRLURRUDLRRUDURRDUDRRRUULRLLRLUDLDRRDUURDDRDRDUUUDUDLDLLRRLUURLUUUDDDUURLULURRLURRRDRDURURUDRLRUURUDRUDDDRDRDLDRDURDLDRRDUUDLLURLDDURRRLULDRDRLLRLLLRURLDURDRLDRUURRLDLDRLDDDRLDLRLDURURLLLLDDRDUDLRULULLRDDLLUDRDRRLUUULDRLDURURDUDURLLDRRDUULDUUDLLDDRUUULRRULDDUDRDRLRULUUDUURULLDLLURLRRLDDDLLDRRDDRLDDLURRUDURULUDLLLDUDDLDLDLRUDUDRDUDDLDDLDULURDDUDRRUUURLDUURULLRLULUURLLLLDUUDURUUDUULULDRULRLRDULDLLURDLRUUUDDURLLLLDUDRLUUDUDRRURURRDRDDRULDLRLURDLLRRDRUUUURLDRURDUUDLDURUDDLRDDDDURRLRLUDRRDDURDDRLDDLLRR
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ULDRUDURUDULLUDUDURLDLLRRULRRULRUDLULLLDRULLDURUULDDURDUUDLRDRUDUDDLDRDLUULRRDLRUULULUUUDUUDDRDRLLULLRRDLRRLUDRLULLUUUUURRDURLLRURRULLLRLURRULRDUURRLDDRRDRLULDDRRDRLULLRDLRRURUDURULRLUDRUDLUDDDUDUDDUDLLRDLLDRURULUDRLRRULRDDDDDRLDLRRLUUDLUURRDURRDLDLDUDRLULLULRLDRDUDLRULLULLRLDDRURLLLRLDDDLLLRURDDDLLUDLDLRLUULLLRULDRRDUDLRRDDULRLLDUURLLLLLDRULDRLLLUURDURRULURLDDLRRUDULUURRLULRDRDDLULULRRURLDLRRRUDURURDURDULURULLRLDD
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DURLRRRDRULDLULUDULUURURRLULUDLURURDDURULLRRUUDLRURLDLRUDULDLLRRULLLLRRLRUULDLDLLRDUDLLRLULRLLUUULULRDLDLRRURLUDDRRLUUDDRRUDDRRURLRRULLDDULLLURRULUDLRRRURRULRLLLRULLRRURDRLURULLDULRLLLULLRLRLLLDRRRRDDDDDDULUUDUDULRURDRUDRLUULURDURLURRDRRRRDRRLLLLUDLRRDURURLLULUDDLRLRLRRUURLLURLDUULLRRDURRULRULURLLLRLUURRULLLURDDDRURDUDDULLRULUUUDDRURUUDUURURRDRURDUDRLLRRULURUDLDURLDLRRRRLLUURRLULDDDUUUURUULDLDRLDUDULDRRULDRDULURRUURDU
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"""
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let inputTest = """
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ULL
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RRDDD
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LURDL
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UUUUD
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"""
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protocol KeyPad {
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associatedtype Digit
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var current: Digit { get }
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mutating func up()
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mutating func down()
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mutating func left()
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mutating func right()
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}
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func solve<T: KeyPad>(pad: T) -> [T.Digit] {
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var pad = pad
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var result: [T.Digit] = []
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for char in input {
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switch char {
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case "U": pad.up()
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case "D": pad.down()
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case "L": pad.left()
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case "R": pad.right()
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case "\n": result.append(pad.current)
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default: fatalError("Invalid input")
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}
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}
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return result
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}
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struct Part1Pad: KeyPad {
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var current: Int = 5
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mutating func up() {
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if current - 3 >= 1 {
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current -= 3
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}
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}
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mutating func down() {
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if current + 3 <= 9 {
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current += 3
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}
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}
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mutating func left() {
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if current != 1 && current != 4 && current != 7 {
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current -= 1
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}
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}
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mutating func right() {
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if current != 3 && current != 6 && current != 9 {
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current += 1
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}
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}
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}
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print("Part 1", solve(pad: Part1Pad()))
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struct Part2Pad: KeyPad {
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let grid: [[Character]] = [
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Array("##1##"),
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Array("#234#"),
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Array("56789"),
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Array("#ABC#"),
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Array("##D##"),
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]
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var x = 0
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var y = 2
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var current: Character {
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grid[y][x]
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}
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mutating func up() {
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if y > 0 && grid[y - 1][x] != "#" {
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y -= 1
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}
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}
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mutating func down() {
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if y < 4 && grid[y + 1][x] != "#" {
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y += 1
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}
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}
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mutating func left() {
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if x > 0 && grid[y][x - 1] != "#" {
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x -= 1
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}
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}
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mutating func right() {
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if x < 4 && grid[y][x + 1] != "#" {
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x += 1
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}
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}
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}
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print("Part 2:", solve(pad: Part2Pad()))
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