68 lines
1.9 KiB
Plaintext
68 lines
1.9 KiB
Plaintext
func check[lines: Array, x: i64, y: i64, dx: i64, dy: i64] : bool
|
|
if x + dx * 3 < 0 || x + dx * 3 >= lines->size || y + dy * 3 < 0 || y + dy * 3 >= (lines->nth(0) as str)->len()
|
|
return false
|
|
|
|
if lines->nth(x)[y] != 'X'
|
|
return false
|
|
if lines->nth(x + dx)[y + dy] != 'M'
|
|
return false
|
|
if lines->nth(x + dx * 2)[y + dy * 2] != 'A'
|
|
return false
|
|
if lines->nth(x + dx * 3)[y + dy * 3] != 'S'
|
|
return false
|
|
|
|
return true
|
|
|
|
func part1[lines: Array] : void
|
|
out := 0
|
|
|
|
for x in 0..lines->size
|
|
for y in 0..(lines->nth(x) as str)->len()
|
|
if check(lines, x, y, 0, 1)
|
|
out += 1
|
|
if check(lines, x, y, 0, -1)
|
|
out += 1
|
|
if check(lines, x, y, 1, 0)
|
|
out += 1
|
|
if check(lines, x, y, -1, 0)
|
|
out += 1
|
|
if check(lines, x, y, 1, 1)
|
|
out += 1
|
|
if check(lines, x, y, -1, -1)
|
|
out += 1
|
|
if check(lines, x, y, 1, -1)
|
|
out += 1
|
|
if check(lines, x, y, -1, 1)
|
|
out += 1
|
|
|
|
io.println_i64(out)
|
|
|
|
func part2[lines: Array] : void
|
|
out := 0
|
|
s := _stackalloc(5) as str
|
|
|
|
for x in 1..lines->size-1
|
|
line_len := (lines->nth(x) as str)->len()
|
|
for y in 1..line_len-1
|
|
if lines->nth(x)[y] == 'A'
|
|
s[0] = lines->nth(x - 1)[y - 1]
|
|
s[1] = lines->nth(x + 1)[y - 1]
|
|
s[2] = lines->nth(x + 1)[y + 1]
|
|
s[3] = lines->nth(x - 1)[y + 1]
|
|
s[4] = 0
|
|
|
|
if s->equal("MSSM") || s->equal("SMMS") || s->equal("MMSS") || s->equal("SSMM")
|
|
out += 1
|
|
|
|
io.println_i64(out)
|
|
|
|
func main[] : i64
|
|
~input, ok := io.read_text_file("input.txt")
|
|
if !ok
|
|
panic("failed to open input.txt")
|
|
|
|
lines := input->split("\n")
|
|
|
|
part1(lines)
|
|
part2(lines)
|