day3: solve part 1 & 2
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323
day3/part1/input
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323
day3/part1/input
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39
day3/part1/main.d
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39
day3/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.countTrees(3, 1).writeln;
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}
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ulong countTrees(T)(T input, int angleX, int angleY)
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in(input.length > 0)
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{
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immutable width = input[0].length;
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size_t count = 0;
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size_t x = 0;
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return input.stride(angleY).map!((row) {
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auto result = row[x];
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x = (x + angleX) % width;
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return result;
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})
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.filter!(pos => pos == '#')
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.count;
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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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.#..#...#.#`.byChar.splitter("\n").map!array.array;
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assert(input.countTrees(3, 1) == 7);
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}
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323
day3/part2/input
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323
day3/part2/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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|
||||
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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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|
||||
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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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||||
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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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||||
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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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||||
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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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|
||||
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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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|
||||
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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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||||
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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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||||
.##.#......##..................
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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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||||
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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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|
||||
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|
||||
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|
||||
.###.........#.....#.##...#....
|
||||
.##..#...##...#..#..#.##.......
|
||||
113
day3/part2/main.d
Normal file
113
day3/part2/main.d
Normal file
|
|
@ -0,0 +1,113 @@
|
|||
import std;
|
||||
|
||||
void main()
|
||||
{
|
||||
File("input", "r").byLineCopy.array.productOfTreesForDefaultSlopes.writeln;
|
||||
}
|
||||
|
||||
alias product = partial!(reverseArgs!(fold!((a, b) => a * b)), 1UL);
|
||||
|
||||
auto productOfTreesForDefaultSlopes(const char[][] input)
|
||||
{
|
||||
return [tuple(1, 1), tuple(3, 1), tuple(5, 1), tuple(7, 1), tuple(1, 2)].map!(
|
||||
slope => input.dup.countTrees(slope[0], slope[1])).product;
|
||||
}
|
||||
|
||||
auto countTrees(const char[][] input, int angleX, int angleY)
|
||||
in(input.length > 0)
|
||||
{
|
||||
immutable width = input[0].length;
|
||||
size_t x = 0;
|
||||
return input.stride(angleY).map!((row) {
|
||||
auto result = row[x];
|
||||
x = (x + angleX) % width;
|
||||
return result;
|
||||
})
|
||||
.filter!(pos => pos == '#')
|
||||
.count;
|
||||
}
|
||||
|
||||
unittest
|
||||
{
|
||||
auto input = `..##.......
|
||||
#...#...#..
|
||||
.#....#..#.
|
||||
..#.#...#.#
|
||||
.#...##..#.
|
||||
..#.##.....
|
||||
.#.#.#....#
|
||||
.#........#
|
||||
#.##...#...
|
||||
#...##....#
|
||||
.#..#...#.#`.byChar.splitter("\n").map!array.array;
|
||||
|
||||
assert(input.countTrees(1, 1) == 2);
|
||||
}
|
||||
|
||||
unittest
|
||||
{
|
||||
auto input = `..##.......
|
||||
#...#...#..
|
||||
.#....#..#.
|
||||
..#.#...#.#
|
||||
.#...##..#.
|
||||
..#.##.....
|
||||
.#.#.#....#
|
||||
.#........#
|
||||
#.##...#...
|
||||
#...##....#
|
||||
.#..#...#.#`.byChar.splitter("\n").map!array.array;
|
||||
|
||||
assert(input.countTrees(3, 1) == 7);
|
||||
}
|
||||
|
||||
unittest
|
||||
{
|
||||
auto input = `..##.......
|
||||
#...#...#..
|
||||
.#....#..#.
|
||||
..#.#...#.#
|
||||
.#...##..#.
|
||||
..#.##.....
|
||||
.#.#.#....#
|
||||
.#........#
|
||||
#.##...#...
|
||||
#...##....#
|
||||
.#..#...#.#`.byChar.splitter("\n").map!array.array;
|
||||
|
||||
assert(input.countTrees(5, 1) == 3);
|
||||
}
|
||||
|
||||
unittest
|
||||
{
|
||||
auto input = `..##.......
|
||||
#...#...#..
|
||||
.#....#..#.
|
||||
..#.#...#.#
|
||||
.#...##..#.
|
||||
..#.##.....
|
||||
.#.#.#....#
|
||||
.#........#
|
||||
#.##...#...
|
||||
#...##....#
|
||||
.#..#...#.#`.byChar.splitter("\n").map!array.array;
|
||||
|
||||
assert(input.countTrees(7, 1) == 4);
|
||||
}
|
||||
|
||||
unittest
|
||||
{
|
||||
auto input = `..##.......
|
||||
#...#...#..
|
||||
.#....#..#.
|
||||
..#.#...#.#
|
||||
.#...##..#.
|
||||
..#.##.....
|
||||
.#.#.#....#
|
||||
.#........#
|
||||
#.##...#...
|
||||
#...##....#
|
||||
.#..#...#.#`.byChar.splitter("\n").map!array.array;
|
||||
|
||||
assert(input.countTrees(1, 2) == 2);
|
||||
}
|
||||
Loading…
Reference in a new issue