153 lines
11 KiB
Swift
153 lines
11 KiB
Swift
let input = """
|
|
#...##......#......##.##..#...##......##.#.#.###.#.#..#..#......####..#......###.#.#....#..##..###..\
|
|
####..#.#...#....#.#####.##.##.#..#.......#....#.##...###.###..#.#.#........#..#.#.##...##..#.####.#\
|
|
...#..##...#.#.###.#.###..#.##.####.###...#...........#.###..##.#.##.#.###...#.#..###....#.###.#..#.\
|
|
.#...##...####.#..#.....#..#...#.#.##...#...##..#.#.###....#..###.....##..#.###..###.....##..###...#\
|
|
..##.#####....##..#.#..##.##..######...#..###.######.....#..##...#.#..##..##..#..#..#..##.#.#.#.#...\
|
|
.###.###.###...##...##..###..##.###.#.....##..##.#.#########...##..##.#..##.#..##..####..#.#.#.#####\
|
|
#.#####..###.###.##.##.#...#.#.#.#..#.###...#..##.###.#...####.#..#.#.....###..#..####..#.#.#...##..\
|
|
....#...##.....#....####.##.#.###..#.#.##..#.#...##.###.###..#.##..#.#.##..##..#.##.###..#.#.###.###\
|
|
##.##...#.##...#.#..#.#..#...###...###.#..#..#.#####..###.#......#.....###.#####.#.#..#.#.#.##..#.#.\
|
|
#.#..#.....#.....##.#..##...###..##...##...###.#.###.#..#.#.###...##..##..#.###...#.#######.#...#.#.\
|
|
#.#.....####.#..#.##...#.##....#####.###.#.....#####....###..#........##..####...#...#.###....#..###\
|
|
##.#.##..#.#.##.#.....##.#.....###.####.#..######.....####.#.#..##.#.##...#..#.#.....#.####.#.......\
|
|
#..#..#.#..#.######.##..##.####.....##.#.##.#.######..#.#....#.#...#.#..#..#.#.###.#..#.#.#..#...###\
|
|
####..####.#.#.###.....#.#.#.##..#.##.##.##.#..##..##.#.##.....#.#..#.####.....###.#..#.####.#.#..##\
|
|
###.##..##.#.##..#..##...#.#####.##.#....##.####.#.##....#..###.#.#.##...#.....#.#.#.#.#..##.#.#..#.\
|
|
......#..####...##.##...#.##.##...##..#..##.###..#...#..##...#.#....###.####...#.##.###.#.##.####.##\
|
|
..#...#####.#.#..#.##....#..#...#..####.....###...##.###....#..#.###...#........#.#.##..#..#.#.....#\
|
|
#######.#.#.###.###..######.##..#####.##.###.###....####.#..##.##...###.#..############.#.##....##.#\
|
|
#.#...##.###.#.###..#.#.#.#.#.#..##..####.#..##.....#.##..#.##...##.#..##..#.#.#....##....##.#..#.#.\
|
|
..#.#.####.....###..#######.#.#.#.#...##.#####.....##...##...##.###..######.###..#...####.#..###.###\
|
|
.#.##....#.#.##..##.#.##.##..######...#.....#..#.#.#.#.....#.#..##.#.#.......#######....#.......#...\
|
|
..###.##.##..##....#.###...#.....##..##......###...##..###.##...##.###.#.#.#.###.###.#.#...###..#...\
|
|
.##.#.#...#...##.#.#...#..#..#.#...##.#.##...##..#....#.#..##.#..#.#..#.#.....#..#.#...#######.#.##.\
|
|
...####....#.###.#..###..##...##..#.#.#.###...#..##.##.##..##.#...#..#.##.....#.#........#..#.#.####\
|
|
.....##..###...#....#.#.#.#...###.###...#.#...#.#.####....#..####...###..#..######..##.##..###.#####\
|
|
#####.##..#....###.###....##.....#.#..#....#.#####.##.#.####.#.##...#..###...###..##...#.###.#####..\
|
|
###.##..........########.######....####.###.#..##...#.##.####.#.....##..#####..###...#####.....#.#.#\
|
|
##..#####.##.#.#####.#.##.##..#.##....########.#####.#...#.###.##...#.###.#.#..#....##.#..#...#.#.#.\
|
|
.##.#....#..#...#..#####..#..##.#......#..#....########...#..#...#.....####.#...##...#.###.#.#..##.#\
|
|
.##.##.#.##.#.##...#.#.#..##.##.###.#..##..#...###.##.###.#####.#.###..#..###.#...#.###.#...#..#.#.#\
|
|
.#..#..#.#..#..###..#....###.####.##.#.###.#.##.###.#.##.###.###...###...###.#...####...#.##.##.#.#.\
|
|
###..##...###...#..##.#..#.#...##....###.##.##..#####....###..#..#....#..###.###.#...#.##...#.#.#..#\
|
|
#....#.......##.....#.##...#..#.###.#.##..##..#.##..#.###..##.##...#####.#..#####..#####..#####....#\
|
|
.####.####....###..###.#.##.####.##.#...####.#.###.#.....#...####..#####.###..#.#.###.##.##...##..#.\
|
|
####..##...##.########...##..###..#..###.##.#.#.#........#.#####.#...#.###.####.#..####..#.#.#....##\
|
|
###.#..#...###.#..#..#.###...##..###.##.#.#...#..#...####..##....#.#..#..##.#.#...#####.###.#..#.#.#\
|
|
...##....#.###.#.#..##...##.###.#..#..#......#...#.#..####.#.##..######.####.#...#..#..#..##.#.#.##.\
|
|
##.####.#...#..#.#.##..##.#.#.###..##...####......#..######.#......#.##.#....##...###.#.#..#......##\
|
|
#.....#...#######.##.#..#.#...###.#..#.####....#.#.##.#.##...###..#...#.###.##..#.###..#.##...#####.\
|
|
#####.##...#..#.#.#.......#.##..#####..#####...###..##.#.#..###.#.#####.####..#.#..##...#.##...#.###\
|
|
.##.#..#######.###.#.####.....##...#.##.#.#..#...##....####......######.#..######.....##########.##.\
|
|
##...#.#..#.##.###.#.#.#.##.###.##..##.##.##...#.#..###.#######..#.....#####..#....######.#..##..###\
|
|
.#.#.###.....#..##..#.#..##..#.###...###.#..##...#...#.#####.#.#####..###.#..#...##..#.#..#..####...\
|
|
.#......##..#.....####.###....##.###.....###.##........#.###.##..#..#.#######.#.######..##..###.....\
|
|
..##.#.#..#.##...#.###.###...######..#..#.#..#....###.#.#....#..........#...##.##.##.#..##..#.#####.\
|
|
###.###.#..#.##..##.#..#..##.....##.....#..#######.#..#.#.#.####.###..###.#.#..#.##.##.####.###.####\
|
|
#.#.#..#....########.#..#..#...##..#.##..#.#..##..####...##.....#.##.#.#...########..#.###.#..#.#.##\
|
|
.##.....#...#.#...##.##....###...##..#.####...#..#.#..#..#.##..#.###.##.####.##..####.....##.#.....#\
|
|
....####.#.##.#.##.#..##.#.######.##.####..#...####.#..###.#.#..#..##.#.#.....##.#####.#.####...#.#.\
|
|
#..#####.#####.....##....######..##....#..#.#.###.#####.....##.##.####.#...##...#.##.#.#####.##.#...\
|
|
##.####..###.#....#...#.#.#.#.###.#####.#.####..####...####......##..#..#..#.#.##...########....#...\
|
|
.###.#.#.#.#..####.##.#..######..#.#.###.....#.#......#.#.#.#..####.##...##.#####.#.##..##..#..#.#..\
|
|
.....###...#...#.####.###.#.#.#.#.....#....#.####.###.##.##.##.#######......#.####......#....##.....\
|
|
##..#..#.#.##..#...#..##.##.##..###.#....##.##....####.#.##.###....#.##.#.#.##...##.###...#..#..####\
|
|
...#.#..##..##.#...##.##...#.#......#.#.##..###....####.##...#.#.###.#..#..#.####..##..##..#####.###\
|
|
.##.##..##########.##...#.##.####.#.#######.##.#.##.##..#...##....########.###..##.##.##.#..##.#.#.#\
|
|
#####.#....#.##..#.....#......##.##..#.##.###..##.......###..##.#.###.##.###....####.#..#.###..#.#.#\
|
|
.#...#..#.##....##....#...####....#...#..#...####...########.###.#..##.#.#.##..###..#.#.###.....##.#\
|
|
##..##.....###......#..###.##.####.##.####.#.#....#..#...#..#.#..#.###.#...#...#..##.##...#..#######\
|
|
.....##..###..##...#####.#.#.....###.#.#..####...#.#.#..#..####..##.#..###.####.#....##..###....#..#\
|
|
#.#.##.#....#.#####.#....##...#...##...##....#.#.......#....#..#...###.###.#.####..####....#.##.#.#.\
|
|
..##...##..###.#.#.##.#..#....#.#.....##.###.#.###.###.....#...#.#..#######.#####..#.###...##......#\
|
|
#......###..#....#.#..#.###.##.#...##..###.####.#.#....#.##..#.###..##.#..#####..##.###.....#..###..\
|
|
##.#.##..##.###.#..##.....#.##.....###....##.####.######.#...#..###....#.#...#.##.....###....#..#.#.\
|
|
.##.#.#.#.##..#.#.#..##..#.###.####....#..###.######..####.#.....###.##..#...###.#..######.##.#.##..\
|
|
...##.####.#..##.#####.##.#...##..#..#...#.#.#.#####...#....#..###...#..#....#.#.##.#.######.#..####\
|
|
..#.#.#.#...#.######.#.....#..#.#..###....#.#.########...#....#.#.##..#...##...#.#..#.#.###....##...\
|
|
#####..#..##..#..##..#..#.#.##.#....#####.####.##.#.###..##..##....#.....#.#####.#...#.#####.##.#.#.\
|
|
#.#..#####...####.###.###.....####.###.....##...##...#..#..#######.#.##....##..####.....##...#..#..#\
|
|
#.#.###.#.#..##..#....#.#...#.#.##.##..#.##.....##...#.#..##.......##.#.###..#####.#.##....#.##.....\
|
|
...#.......#....#.#.####.#.###.###..#....#..##.#..####........#.##..#...#.#...###.#..#.#.#...#...#..\
|
|
...##.#####.##.#.###.##.##.#.##..##.#.#.#.#.#.##.#..##...##.#.#..#..##.##.#####.#.###...#####..#..#.\
|
|
#######.#..#..#....##.#.#..####.#..#..###...#..#.......###.#.#.####....#.###...#.#.###.#.#.#.#..###.\
|
|
..##.##.#.##.###....###.##.#.###.#...#....#.####..###..###.#.#..#...##.#.#.#..##.###..###.#.##...###\
|
|
######..######..##..##.#.#.##.##.#..##..#.#.#.##..#.#...#...#.#.#..######.#..#.#.######..#......##.#\
|
|
#.#####.....#.......#########..###.##...#...##.#.#..#...#####...#...#..#.###.#..#.#...###.#.#.#...#.\
|
|
#....##....###...##.##.#...##.........##.#.#..#.#.##.#.######.#####..#..###.###.#...#.#.##.######...\
|
|
#.#...###.#.###.##.#.######.#######.###.##..#.#.#...######.##.####.##..#.#.#.#......##..##.........#\
|
|
..###..##....#.....##...#.#.###.#.#.....##.#...###.####.#...#...##..##.#.#.####..###...######....#.#\
|
|
..###.#.##.####.#..#.##....##..#####....#..##.##.#..#######...#.####...##.#.#.##.........#....#....#\
|
|
.##.#...#.####..#.#...#.##..######.##..##.#.###.##..###.###....##..#.##.##..##.#...###.##.##.###....\
|
|
#...###.###.#..#....#.......#..#.....###..#.###.##.##....#.####.#.####.##..##..#..#.....#....##.#.#.\
|
|
.##.#..#..#.##.......#.####.#######.....#.##.##.#.....#.#..#....######.#..###.##.##.....#.####..##.#\
|
|
###..#.###.#..####.....##....#..####....#.##.##..#...######.#########...#.#....##...###.#..#.##...#.\
|
|
#..###..##..#.#.##.###.#.#.##...###.#...##.##..#.###....###..#.#...#.###..######.#..#.###..#..#..#.#\
|
|
.#........##.#.###..###.#.#.##.....##.##.#.#...##..#.##....###..#.#.#.#.##....#.##..#.#...###...#...\
|
|
####.####..#....#.#.#..#..##.......##.####...###.##..#.#.##.#..##..######.......##.#.##..#...#.....#\
|
|
..#..#..###..##.##..######.#..###..###.#.##..##.#..#####.#.#.#.##..#.##..##.##......####.#..........\
|
|
...##.##..###.#...###....#.#.#.#.....#.##.....##...#...#......####...##.##....##.#..#.####.#..###.#.\
|
|
..#.....####.#.###.#####..#..###..#..#.#...#####...###.###....#.###..#...#..#..#.#..#.##..##.#.#....\
|
|
..##.#####...###.###.........#....##.####.##..#.#..#.#...#...##.##.##..#.#.##.########......#####...\
|
|
...###.#.#..#...#.###.###.......##.###.#..#.##########...#..#.#.#.##.#.###...######..#.#...###.##...\
|
|
.#.#.#######.#..##.##..##...#...####...#..#####.#..##...###.#.#...#.##...#......#..##.####..#.....##\
|
|
.##.##.#.#......#######..###.....##.#.##..###......#....####...#.###.#.##.#........#..#....##.....##\
|
|
#...#.###.#.##...##.####....#...#.###..#.#.....#.#....#.#.#.##...#.#..#####.#.#..#..#..#....#...####\
|
|
.....##...###......#####..##.##.##...##.#.#####..##...#.#.#.#.###...###.##.####..#.#..#.#..#.####.##\
|
|
#..#..##.#.##.#.##.#.#.#..###....###.##.#.##.#...#.#..#...#....###.#..#.#.######.#...####..#..##.#.#\
|
|
#..#.#..#...###.#..##.#...#...##.#......#...#..#..####..##.....#.###...#.#..#.#....#.#####.##.###...\
|
|
###....#.#..#.#..###..#.##......#...#..#..##.#..###..##..#..#.####..#...########..##.#.##.#.#.#...#.\
|
|
.#.#.##.##.###..#...#.#....#..#.##..#.#.#.#.##.##.#####...#........####..###..####.#####..#.##.#.##.
|
|
""".utf8
|
|
|
|
let on = UInt8(ascii: "#")
|
|
let off = UInt8(ascii: ".")
|
|
|
|
func step(input: [UInt8]) -> [UInt8] {
|
|
assert(input.count == 100 * 100)
|
|
var result: [UInt8] = []
|
|
result.reserveCapacity(input.count)
|
|
|
|
func isOn(_ x: Int, _ y: Int) -> Bool {
|
|
return input[x + y * 100] == on
|
|
}
|
|
|
|
for y in 0..<100 {
|
|
for x in 0..<100 {
|
|
var onCount = 0
|
|
for i in -1...1 where (0..<100).contains(i+y) {
|
|
for j in -1...1 where (0..<100).contains(x+j) && !(i == 0 && j == 0) {
|
|
if isOn(x + j, y + i) {
|
|
onCount += 1
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
if (x, y) == (0, 0) || (x, y) == (0, 99) || (x, y) == (99, 0) || (x, y) == (99, 99) {
|
|
result.append(on)
|
|
} else if isOn(x, y) {
|
|
result.append((onCount == 2 || onCount == 3) ? on : off)
|
|
} else {
|
|
result.append(onCount == 3 ? on : off)
|
|
}
|
|
}
|
|
}
|
|
|
|
return result
|
|
}
|
|
|
|
var current = Array(input)
|
|
current[0] = on
|
|
current[99] = on
|
|
current[99 * 100 + 0] = on
|
|
current[99 * 100 + 99] = on
|
|
|
|
for _ in 0..<100 {
|
|
current = step(input: current)
|
|
}
|
|
|
|
let count = current.lazy.filter { $0 == on }.count
|
|
|
|
print("\(count) lights on")
|