day11: solve part 1 & 2
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acf28cb71a
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98
day11/part1/input
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day11/part1/input
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204
day11/part1/main.d
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204
day11/part1/main.d
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import std;
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void main()
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{
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File("input", "r").byLineCopy.array.calculateNumberOfOccupiedSeatsStable.writeln;
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}
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auto calculateValidNeighbouringSeatPositions(size_t i, size_t j, size_t height, size_t width)
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{
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return [
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tuple(i - 1, j - 1), tuple(i - 1, j), tuple(i - 1, j + 1), tuple(i,
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j - 1), tuple(i, j + 1), tuple(i + 1, j - 1), tuple(i + 1, j),
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tuple(i + 1, j + 1)
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].filter!(position => position[0] >= 0 && position[0] < height
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&& position[1] >= 0 && position[1] < width);
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}
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auto calculateNewSeatState(const char seat, ulong numberOfOccupiedNeighbouringSeats)
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{
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if (seat == '#' && numberOfOccupiedNeighbouringSeats >= 4)
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{
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return 'L';
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}
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else if (seat == 'L' && numberOfOccupiedNeighbouringSeats == 0)
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{
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return '#';
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}
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else
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{
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return seat;
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}
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}
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auto calculateNextSeatOccupation(const char[][] seats)
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{
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if (seats.empty || seats.front.empty)
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{
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return seats;
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}
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immutable height = seats.length;
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immutable width = seats.front.length;
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return seats.enumerate.map!((indexedRow) {
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immutable i = indexedRow.index;
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const row = indexedRow.value;
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return row.byChar.enumerate.map!((indexedSeat) {
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immutable j = indexedSeat.index;
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immutable seat = indexedSeat.value;
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immutable numberOfOccupiedNeighbouringSeats = calculateValidNeighbouringSeatPositions(i,
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j, height, width).map!(position => seats[position[0]][position[1]])
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.filter!(it => it == '#')
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.count;
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return seat.calculateNewSeatState(numberOfOccupiedNeighbouringSeats);
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}).array;
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}).array;
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}
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unittest
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{
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auto input = `L.LL.LL.LL
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LLLLLLL.LL
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L.L.L..L..
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LLLL.LL.LL
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L.LL.LL.LL
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L.LLLLL.LL
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..L.L.....
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LLLLLLLLLL
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L.LLLLLL.L
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L.LLLLL.LL`.dup.split("\n");
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assert(input.calculateNextSeatOccupation.join("\n") == `#.##.##.##
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#######.##
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#.#.#..#..
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####.##.##
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#.##.##.##
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#.#####.##
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..#.#.....
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##########
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#.######.#
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#.#####.##`);
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}
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unittest
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{
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auto input = `#.##.##.##
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#######.##
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#.#.#..#..
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####.##.##
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#.##.##.##
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#.#####.##
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..#.#.....
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##########
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#.######.#
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#.#####.##`.dup.split("\n");
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assert(input.calculateNextSeatOccupation.join("\n") == `#.LL.L#.##
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#LLLLLL.L#
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L.L.L..L..
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#LLL.LL.L#
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#.LL.LL.LL
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#.LLLL#.##
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..L.L.....
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#LLLLLLLL#
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#.LLLLLL.L
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#.#LLLL.##`);
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}
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unittest
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{
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auto input = `#.LL.L#.##
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#LLLLLL.L#
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L.L.L..L..
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#LLL.LL.L#
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#.LL.LL.LL
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#.LLLL#.##
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..L.L.....
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#LLLLLLLL#
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#.LLLLLL.L
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#.#LLLL.##`.dup.split("\n");
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assert(input.calculateNextSeatOccupation.join("\n") == `#.##.L#.##
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#L###LL.L#
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L.#.#..#..
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#L##.##.L#
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#.##.LL.LL
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#.###L#.##
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..#.#.....
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#L######L#
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#.LL###L.L
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#.#L###.##`);
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}
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unittest
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{
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auto input = `#.##.L#.##
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#L###LL.L#
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L.#.#..#..
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#L##.##.L#
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#.##.LL.LL
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||||
#.###L#.##
|
||||
..#.#.....
|
||||
#L######L#
|
||||
#.LL###L.L
|
||||
#.#L###.##`.dup.split("\n");
|
||||
assert(input.calculateNextSeatOccupation.join("\n") == `#.#L.L#.##
|
||||
#LLL#LL.L#
|
||||
L.L.L..#..
|
||||
#LLL.##.L#
|
||||
#.LL.LL.LL
|
||||
#.LL#L#.##
|
||||
..L.L.....
|
||||
#L#LLLL#L#
|
||||
#.LLLLLL.L
|
||||
#.#L#L#.##`);
|
||||
}
|
||||
|
||||
unittest
|
||||
{
|
||||
auto input = `#.#L.L#.##
|
||||
#LLL#LL.L#
|
||||
L.L.L..#..
|
||||
#LLL.##.L#
|
||||
#.LL.LL.LL
|
||||
#.LL#L#.##
|
||||
..L.L.....
|
||||
#L#LLLL#L#
|
||||
#.LLLLLL.L
|
||||
#.#L#L#.##`.dup.split("\n");
|
||||
assert(input.calculateNextSeatOccupation.join("\n") == `#.#L.L#.##
|
||||
#LLL#LL.L#
|
||||
L.#.L..#..
|
||||
#L##.##.L#
|
||||
#.#L.LL.LL
|
||||
#.#L#L#.##
|
||||
..L.L.....
|
||||
#L#L##L#L#
|
||||
#.LLLLLL.L
|
||||
#.#L#L#.##`);
|
||||
}
|
||||
|
||||
auto calculateNumberOfOccupiedSeatsStable(const char[][] seats)
|
||||
{
|
||||
return recurrence!((seats, n) => seats[n - 1].calculateNextSeatOccupation)(seats).slide(2)
|
||||
.map!array
|
||||
.find!((pair) => pair[0] == pair[1])
|
||||
.front
|
||||
.front
|
||||
.join
|
||||
.filter!(seat => seat == '#')
|
||||
.count;
|
||||
|
||||
}
|
||||
|
||||
unittest
|
||||
{
|
||||
auto input = `L.LL.LL.LL
|
||||
LLLLLLL.LL
|
||||
L.L.L..L..
|
||||
LLLL.LL.LL
|
||||
L.LL.LL.LL
|
||||
L.LLLLL.LL
|
||||
..L.L.....
|
||||
LLLLLLLLLL
|
||||
L.LLLLLL.L
|
||||
L.LLLLL.LL`.dup.split("\n");
|
||||
assert(input.calculateNumberOfOccupiedSeatsStable == 37);
|
||||
}
|
||||
98
day11/part2/input
Normal file
98
day11/part2/input
Normal file
|
|
@ -0,0 +1,98 @@
|
|||
LLLLL.LLLLLLL.LLLLLL.L.LLLL..LLLL.LLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.L.LLLLLLLLLLLLLL.LLLLLL
|
||||
LLLLLLLLLLLLLLL.LLLL..LLLLLLLLLLLL.LLLLLLLL.L..LLLLLLLLLLLL.LLLL.LLL.LLLLL.LLL.LLLLLLLLLLL
|
||||
LLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLLLL.LLLLLLLLLLL.LLL.LLLLLLLL.LLLLL.LL.LLLLL.LLLLLLLL.LLLLLL
|
||||
LLLLL.LLLLLLLLL.LLLL.LLLLLL.LLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLL.LLL.LLLLLLLL.LLLLLL
|
||||
LLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLL.LLLLLLLLL.LLLLLLLLLLLLL.LLLLLL
|
||||
LLLLLLLLLLLLLLL.LLLL.LLLLLLLLLLLLLLLLLLLLLL.L.LLLLLL.LLLLLL..LLLLLL..LLLLLLLLLLLLLL.LLLLLL
|
||||
.L..L.L.L.LL..LL.........L....L.L..LL.LLLL.L..L.LLLL.L.L..L.......LL...LL..LL.L..L.L.LL..L
|
||||
LLL.L.LLL.LLLLL..LLL.LLLLLL.LL.L.L.LLLLLLLL.LLLLLLLL.LLLLLL.LLLLLLLL.LLLLL.LLLLLLLL..LLLLL
|
||||
LL.L..LLLLLLLLLLLLLL.LLLLLL.LLLLLL.LLLLLLLLLLLLLLLLL.LLLLLL.LLLL.LLLLLLLLL.LLLLLLLLLLLLLLL
|
||||
LLL.LLL.LLLL.LL.LLLL.LLLLLLLLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLL
|
||||
LLLLLLLLL.LLLLL.LLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLL.LLLLL.LL.LLL
|
||||
LLLLL.LLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLL.LLLLLL
|
||||
LLLLL.LLLLLLLLL.LL.LLLLLL..LLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLL..LLLLLLL.LLL.LL.LLLLLLL.LLLLLL
|
||||
LLLLL.LLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLL.LL.LLLLLL
|
||||
LLLLL.LLLLLLLLL.LLLL.LLLLLL.LLLL.LLLLLLLLL..LLLLLLLL.LLLLLL.L.LLLLLLLLLLLL.LLLLLLLL.LLLLLL
|
||||
LLLLL.LLLLLLLLL.LLLLLLLL.LLL.LLLLL.LLLLLLLL.LLL.LLLL.LLLLLL.LLLLLL.LLLLLLL.LLLLL.LLLLLLLLL
|
||||
...L..L..........L...L..LLL..L....LL......L......L.L.L...........L....L.L.LL..LL.L....LL..
|
||||
LLLLL.LLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
|
||||
LLLLL.LLLLL.LLLLLLLLLLLLLLL.LLLLLL.LLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLL.LLLLLLLL.LLLLLL
|
||||
LLLLL.LLLLLLLLL.LLLLLLLLLLL..LLLLL..LLLLLLL.LLLLLLLL..LLLLL.LLLLLLLL.LLLLLLLLLLL.LL.LLLLLL
|
||||
LLLLL.LL.LLL.LL..LLLL.LLLLL.LL.LL..LLL.LLLL.LLLLLLL..LLLLLLLL.LLLLLL.LLLL..LLLLLLLL.LLLLLL
|
||||
LLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLL.L.LLLLLLLL..LLLLLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLLLL
|
||||
LLLLL.LLLLLLLLL.LLLL.LLLLLL.LLLLLLL.LLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLL.LLLL..LLLLLLLL.LLLLLL
|
||||
LLLLLLLLLLL.LLL.LLLL.LLLLLL.L.LLLLLLLLLLLLL.LLLLLLLLLLLLLLL.LLLLLLLLLLLLLL.LLLLLLLLLLLLLLL
|
||||
LL...L.LLL.....L....LL.....L...L.L....L.L.....L.LL...L..L.....L.L..LLL.L.LL.LLLL..........
|
||||
LLLLL.LLLLLLLLL.LLLL.LLLLL.LLLLLLLLLLL.LLL..LLLL.LLL.LLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
|
||||
LLLLL.LLLLLLLLL.LLLL.LLLLLL..LLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLLL..LLLLLLL.LLLLLL
|
||||
LLLLLLLLLLLLLLL.LLL..LLLLLL.LLLLL.LL.LLLLLL.LLLLLL.LLLLLLLL.LLLLLLLLLLLLLL.LLLLLLLL.LLLLLL
|
||||
LLLLL.LLL.LLLLL.LLLLLLLLLLLLLLLLLL.LLLLLLL..LLLLL.LLLLLLLLL.LLLLLLLL.LLLLL..LL.LLLL.LLLLLL
|
||||
L..LL.L.....L...LL.....L.L........L..LL...L.....L....L..L.L...L...LL.......L.L....L.......
|
||||
LLLLL..LLLLLLLL.LLLL.LLLLLL.LLLLLLLL.LLLL.LLLLLLL.LLLLLLLLLLLLLLLLLL..LLLL.LLLLLLLL.LLLLLL
|
||||
LLLLLLLLLLLLLLL.LLLL.LLLLLL.LLLLLLLLLLLLLLL.LLLL.LLL.LLLL.L.LLLLLLLLLLLLLLLLL.L.LLL.LLLLLL
|
||||
LLLLL.LLLLLLLLL.LL.LLLLLLLLLLLLLLL.LLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL..LLLLL
|
||||
LLLLLLLLLLLLLLL.LLL..LL.LLLLLLLLLLLLLLLLLLL.LLL.LLLL.LLLLLL.LLLLLLLL.LLLLLLLLLLLLLL.LLLLL.
|
||||
LLLLL.LLLLLLLLL.LLLLLLLLLLLLL.LLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLLL.LLLLLL
|
||||
LLLLL.LLLLLLLLLLLL.L.LLLLLL.LLLLLLLLLLLLLLL.LL.LLLLL.LLLLLL.LLLLLLLL.LLLLLLLLLLLLLL.LLLLLL
|
||||
LLLLLLLLLLLLLLL..LLL.LLLLLL.LLLLLLLLL.LLLLLLLLLLLLLL.LLLLLL.LLLLLLLL.LLLLL.LLLLLLLLLLLLLLL
|
||||
LLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLLLL.LLLLL.LL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLL.LL
|
||||
.L.LLLLL.............L.LL.L.LLL.L.LL....L...L...L.....L..L...LLLL..L..L.......L.L.LLL.LLLL
|
||||
LLLLL.LLLLLLLLLLLLLLLLLLLLL..LLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLLLL
|
||||
LLLLL.LLLLLLLLL.LLLL.LLLLLL.LLLLLL.LLLLLLLL.LLLLLLLLLLL.LLL.LL.LLLLL.LLLLL.LLLLLL.LLLLLLLL
|
||||
LLLLLLLLLL.LLL.LLLLL.LLLLLL.LLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLL.LLLL
|
||||
LLLLL.LLLLLLLLL.LLLL.LLLLLL.LLLLLLLLLL.LLLL.LLLLLLLLLLLLLLL.LLLLLLLL.LLLL..LLLLL.LLLLLLLLL
|
||||
LLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLLLL.LLLLLLLLLLLLLLLL..LLLLLL.LLLLLLLL.LLLLL.LLLLLLLL.LLLLLL
|
||||
LLLL..LLLLLLLLL..LLL.LLLLLL.L.LLLLLL.LLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.L..LL.LLLLLLLL.LLLLLL
|
||||
LLLLL.LLLLLLLLLLLLLL.LLLLLL.LLLLLL.LLLLLLLL.LLLLLLL..LLLLLLLLLLLLLLL.LLLLL.LLLLLLLL.LLLLLL
|
||||
LLLLL.LLLLLLLLL.LLLLLLLLLLL.LLL.LLLLLLLLLLL.LLLLLLLL.LLLLLL.LLLLLLLL.LLLLLLLLLLLLL..LLLLLL
|
||||
LLLLL.LLLLL.LLL..LLL.LLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLL.LLL.LL
|
||||
.L.......LL...L...L.LL.LL......L..L...L...L...L....LL..L...L..LLL.....L.....L.....LLL.LL..
|
||||
LLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLL..LLLLL.LL.LLLLL.LLLLLLL..L.LLLL
|
||||
LLLLL.LLLLLLLLLLLLLLLLLLLLL.L.LLLLLLLLLLL.L.LLL.LLLL.LLLLLLLLLLLLLLL.LLLLLLLLLLLLLL.LLLLLL
|
||||
LLLLL.LLLLLL.LLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLL.LLLLLL.LLLLL.LLLLLLLL.LLLLLLLLLLLLLLL
|
||||
LLLLL.LLLLLLLLL.LLLL.LLLLLL.LLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLL.L.LLLLL.LL.LLLLL.LLLLLL
|
||||
LLLL..LLLLLLLLL.LLLLLLLLLLL.LL.LLL.LLLLLLLL.LLLLLLLLLLLL.LL.LLLLLLLL.LLLLL.LLLLLLLL.LLLLLL
|
||||
.......L......L....L....L......L...L.L..L...L.LL.....L......L.......LL.........L.L.L...LLL
|
||||
L.LLL.LLLLLLLLL.LLLL.LLLLL..LLLLLL.LLLLLLLLLLLLLL.LL.LLLLLL.LLLLLL.L.LLLLL.LLLLL.LLL.LLLLL
|
||||
LLLLL.LLLLLLLLLLL.LL.LLLLLL..LLLL..LLLLLLLLLLLLLLLLL.LLLLLL.LLLLLLLL.LLLLL.LLLLLLLLLLLLLLL
|
||||
LLLLLLLLLLLLLLL.LLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLL.LLLLLLLL.LLL.LLLLLLLLLL.LLLLLL
|
||||
LLLLLLLLLLLLLLLLLLLL.LLLLLL.LLLLLL.LLLL.LLL.LLLL.LLL.L..LLL.LLL.LLLL.LLLLLLL.LLLLLLLLLLLLL
|
||||
LLLL.LLLLLLLLLL.L.LL.LLLLLL.LLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLL.LLLLL.LLLLL.LLLLLLLL.LLLLLL
|
||||
LLLLL.LLLLLLLLL.LLLLLL.LLL..LLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLLLLLL.LLL.LLLLLLLLLLLLLL.LLLLLL
|
||||
.LLLLLLLLLLLLLL.LLLLLLLLLLLLL.LLLL.LLLLLLLL.L.LLLLLL.LLLLLL.LLLLLLLL.LLLLL.LLL.LLL..LLLLLL
|
||||
LLLLLLLLLLLLLLL.LLLL.LLLLLLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
|
||||
L...L.........L....L......LL..LL.....LL.L..LLL....L.L...L..LLL.......LL.L...L..L...LL...L.
|
||||
LLLLL.LLLL.LLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLL.LLL.LLLLLLLLLL.LLLLLLLLL.LLLLL
|
||||
LLLLL.L.LLLLLLLLLLLL.LLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLL.LLLLL.LLLLLLLL.LLLLL..LL.LLLLLLLLLLL
|
||||
LLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLLLLL.LLLLLLLL.L.LLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLL
|
||||
LLLLL.LLLLLLLLL.LLLL.LLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLL.LLLLLLLLLLLLLL.LLLLLLLL.LL.LLL
|
||||
LLLLL.LLLLLLLLLLLLLL.LLLLLL.LLLLLL.LLLLLLLL.LLLLLLLL.LLLLLL.LLLLLLLL.LLLLL.LLLLLLLL..LLLLL
|
||||
.L.L.L..L.L...LLLLLL.....LL...L..L..L......LLLL.L.LL.....LLLL.LL.L.....L.L...L....L...L...
|
||||
LLLL..LLLLLL.LL.LLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLL.LLLLLLLL.LLLLL.LLLLL.LLLLLLLLL
|
||||
LLLLL.LLLLLLLLL.LLLLLLLLLLL..LLLLL.L.L.LLLLLLLLLLLLL.LLLLLL.LLLLLLLLLLLLLL.LLLLLLLL.LLLLLL
|
||||
LLLLL.LLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLL.LLLLLLLLLL.LLLLLL.LLL.LLLLLLLLLLLLLL.LLLL..LLLLL
|
||||
LLLLLL.LLLLLL.LLLLLLLLLLLLL.LLLLLLLL.LLLLLL.LLLLLLLL.LLLLLL.LLLLLLLL.LL.LL..LLLLLLL.LLLLLL
|
||||
LLLLL.LLLL..LLLLL.LL.LLLLLL.LLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLL.LLLLL.LLLL.LLL.LLLLLL
|
||||
....L........L..L...........L.L............L.....LL..L.L.L.........LLLLLL.LL..L..L.L..L...
|
||||
LL.LLLLLLLLLLLL.LLLLLLLLLLL.LLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLL.L..LLLL..LLLLLL
|
||||
LLLLL.LLLLLLLLL.LLLL.LLLLLLLLLLL.L.LLLLLLLL.LLLLLLLL.LLL.LL.LLLLLLLL..LLLL.LLLL.LLLLLLLLLL
|
||||
LLLL.LLLLLLLLLL.LLLL.LLLLLL.LLLLLLLLLLLLL.L.LLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLL.LLLLLL
|
||||
LLLLLLLLLLLLLLLLLLLL.LLLLLL.LLLLLLLLLLL.LLL.LLLLLLLL.LLLLLLLLLLL.LLL.LLLLL.LLLLLLL..LLLLLL
|
||||
LLLLL.LLLLLLLLLLLLLL.LLLLLLLLLLLLLL.LLLLLLL..LL.LLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLL.LLLLLL
|
||||
LLLLL.LLLLLLLLLLLLLL.LLLLLL.LLLLLL..LLLLLLL.LLLLL.LL.LLLLLL.LLLLLLLL.LLLLLLLLLLLLLL.LLLLLL
|
||||
LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL...LLLLLL.LLLL.L.LLLLL.LL.LLLLL.LLLLLLLL.L.LLLL
|
||||
LLLLLLLLLLLLLLL.LLLL.L.LLLL.LLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLL.L.LLLLLL.LLLLLL
|
||||
L.LLL......LLL....L.......L..L..L.....LL......L.LLLL...L.....L.L............L.LL....LL....
|
||||
LLLLLLLLLLLLLLL.LLLLLLLLLLL.LLL.LL.LLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLL.LLLLLLLL.LLLLLL
|
||||
L..LL.LLLLLLLLL.LLLLLLLLLLLLLLLLLL.LLLLL.LLLL.LLLLLL.LLLLLLLLLLLLLLL.LLLLLLL.LLLLLL.LLLLLL
|
||||
LLLLL.LLLLLLLLL.LLLLLLLLLLL.LLLLL..LL.LLLLL.LLLLLLLL.LLLLLL.LLLLLLLL.LLLLL.LLL.LLLL.LLLLLL
|
||||
LLLLL.LL.LLLLLL.LLLL.LLLLLL.LL.LLL.LLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLLLLLLLL
|
||||
LLLLLLLLLLLLLLL.LLLLLLL..LL.LLLL.L.LLLLLLLL.L.LLLLL..LLLLLL.LLLLLLL..LLLLLLLLLLLLLL.LLLLLL
|
||||
LLL...LLLLLLLLL.LLLL.LLLLL..LLLLLLL.LLLLLLL...LLLLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLLL.LLL.LL
|
||||
LLLLLLLLLLLLLLL.LLLL.LLLLLL.LLLL.LLLLLLLLLL.LLLLLLL.LLL.LLLLLLLLLL.L.LLLLLLLLLLLLLL.L.LLLL
|
||||
...L.L.L.L.....LL...L...LL.L........L...LL.L...........L..L.L.L.L..L...LL.LL.L.L.L....L..L
|
||||
LLL.L.LLLLLLLLL.LLLL.L.LLLLLLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLL.LLLLLLLL..LLLL.LLLLL.LL.LLLLLL
|
||||
LLLLL.LLLLLLLLL.LLLL.LLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLL.LLL.LLLLLLLLLL.LLLLLLLLLLLLLLL
|
||||
LLLLL.LLLLLLLLL.LLLL.LLLLLL.LLLLLL.LLLLLLLL.LLLLLLLL.LLLLLLLLLLLLLLL.LLLL..LLLLLLLL.LLLLLL
|
||||
LLLLL.LLLLLLLLLLLLLL.L.LLLL.LLLL.L.LLLLLLLL.LLLLLLLL.LLL.LL.LLLLLLLL.LLLLL.LLLLLLLL.LLLLLL
|
||||
LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLL.LLLLLLL.LLLLLLL.LLLLL.LLLLLLLL.LLLLLL
|
||||
148
day11/part2/main.d
Normal file
148
day11/part2/main.d
Normal file
|
|
@ -0,0 +1,148 @@
|
|||
import std;
|
||||
|
||||
void main()
|
||||
{
|
||||
File("input", "r").byLineCopy.array.calculateNumberOfOccupiedSeatsStable.writeln;
|
||||
}
|
||||
|
||||
auto calculateNewSeatState(const char seat, ulong numberOfSeenOccupiedSeats)
|
||||
{
|
||||
if (seat == '#' && numberOfSeenOccupiedSeats >= 5)
|
||||
{
|
||||
return 'L';
|
||||
}
|
||||
else if (seat == 'L' && numberOfSeenOccupiedSeats == 0)
|
||||
{
|
||||
return '#';
|
||||
}
|
||||
else
|
||||
{
|
||||
return seat;
|
||||
}
|
||||
}
|
||||
|
||||
auto generateIndexes(ptrdiff_t posY, ptrdiff_t posX, ptrdiff_t y, ptrdiff_t x)
|
||||
{
|
||||
return recurrence!((state, n) => tuple(state[n - 1][0] + y, state[n - 1][1] + x))(
|
||||
tuple(posY, posX)).drop(1);
|
||||
}
|
||||
|
||||
auto isValidPosition(Tuple!(ptrdiff_t, ptrdiff_t) pos, size_t height, size_t width)
|
||||
{
|
||||
return pos[0] >= 0 && pos[0] < height && pos[1] >= 0 && pos[1] < width;
|
||||
}
|
||||
|
||||
auto findFirstSeatInDirection(const char[][] seats, const Tuple!(ptrdiff_t,
|
||||
ptrdiff_t) direction, const Tuple!(ptrdiff_t,
|
||||
ptrdiff_t) initialPosition, const size_t height, const size_t width)
|
||||
{
|
||||
return generateIndexes(initialPosition[0], initialPosition[1], direction[0], direction[1]).until!(
|
||||
pos => !pos.isValidPosition(height, width))
|
||||
.map!(pos => seats[pos[0]][pos[1]])
|
||||
.find!(seat => seat != '.');
|
||||
}
|
||||
|
||||
auto calculateNextSeatOccupation(const char[][] seats)
|
||||
{
|
||||
if (seats.empty || seats.front.empty)
|
||||
{
|
||||
return seats;
|
||||
}
|
||||
auto height = seats.length;
|
||||
auto width = seats.front.length;
|
||||
|
||||
return seats.enumerate.map!((indexedRow) {
|
||||
ptrdiff_t i = indexedRow.index;
|
||||
auto row = indexedRow.value;
|
||||
return row.byChar.enumerate.map!((indexedSeat) {
|
||||
ptrdiff_t j = indexedSeat.index;
|
||||
auto seat = indexedSeat.value;
|
||||
auto numberOfSeenOccupiedSeats = [
|
||||
tuple(0L, 1L), tuple(-1L, 1L), tuple(-1L, 0L), tuple(-1L,
|
||||
-1L), tuple(0L, -1L), tuple(1L, -1L), tuple(1L, 0L), tuple(1L, 1L)
|
||||
].map!(direction => findFirstSeatInDirection(seats, direction,
|
||||
tuple(i, j), height, width))
|
||||
.filter!(lineOfSight => !lineOfSight.empty)
|
||||
.map!(lineOfSeight => lineOfSeight.front)
|
||||
.filter!(it => it == '#')
|
||||
.count;
|
||||
return seat.calculateNewSeatState(numberOfSeenOccupiedSeats);
|
||||
}).array;
|
||||
}).array;
|
||||
}
|
||||
|
||||
unittest
|
||||
{
|
||||
auto input = `L.LL.LL.LL
|
||||
LLLLLLL.LL
|
||||
L.L.L..L..
|
||||
LLLL.LL.LL
|
||||
L.LL.LL.LL
|
||||
L.LLLLL.LL
|
||||
..L.L.....
|
||||
LLLLLLLLLL
|
||||
L.LLLLLL.L
|
||||
L.LLLLL.LL`.dup.split("\n");
|
||||
assert(input.calculateNextSeatOccupation.join("\n") == `#.##.##.##
|
||||
#######.##
|
||||
#.#.#..#..
|
||||
####.##.##
|
||||
#.##.##.##
|
||||
#.#####.##
|
||||
..#.#.....
|
||||
##########
|
||||
#.######.#
|
||||
#.#####.##`);
|
||||
}
|
||||
|
||||
unittest
|
||||
{
|
||||
auto input = `#.##.##.##
|
||||
#######.##
|
||||
#.#.#..#..
|
||||
####.##.##
|
||||
#.##.##.##
|
||||
#.#####.##
|
||||
..#.#.....
|
||||
##########
|
||||
#.######.#
|
||||
#.#####.##`.dup.split("\n");
|
||||
assert(input.calculateNextSeatOccupation.join("\n") == `#.LL.LL.L#
|
||||
#LLLLLL.LL
|
||||
L.L.L..L..
|
||||
LLLL.LL.LL
|
||||
L.LL.LL.LL
|
||||
L.LLLLL.LL
|
||||
..L.L.....
|
||||
LLLLLLLLL#
|
||||
#.LLLLLL.L
|
||||
#.LLLLL.L#`);
|
||||
}
|
||||
|
||||
auto calculateNumberOfOccupiedSeatsStable(const char[][] seats)
|
||||
{
|
||||
return recurrence!((seats, n) => seats[n - 1].calculateNextSeatOccupation)(seats).slide(2)
|
||||
.map!array
|
||||
.find!((pair) => pair[0] == pair[1])
|
||||
.front
|
||||
.front
|
||||
.join
|
||||
.filter!(seat => seat == '#')
|
||||
.count;
|
||||
|
||||
}
|
||||
|
||||
unittest
|
||||
{
|
||||
auto input = `L.LL.LL.LL
|
||||
LLLLLLL.LL
|
||||
L.L.L..L..
|
||||
LLLL.LL.LL
|
||||
L.LL.LL.LL
|
||||
L.LLLLL.LL
|
||||
..L.L.....
|
||||
LLLLLLLLLL
|
||||
L.LLLLLL.L
|
||||
L.LLLLL.LL`.dup.split("\n");
|
||||
assert(input.calculateNumberOfOccupiedSeatsStable == 26);
|
||||
}
|
||||
Loading…
Reference in a new issue