Krotki day4

2024/04/krotki/part1.v

@@ -0,0 +1,44 @@
+module main
+
+import os
+
+fn main() {
+	input := os.get_lines()
+
+	dirs := [
+		[0, 1],
+		[0, -1],
+		[1, 0],
+		[-1, 0],
+		[1, 1],
+		[1, -1],
+		[-1, 1],
+		[-1, -1],
+	]
+
+	xmax := input[0].len
+	ymax := input.len
+
+	mut count := 0
+	for y, line in input {
+		for x, c in line.bytes() {
+			if c == `X` {
+				dirl: for dir in dirs {
+					for dist, letter in 'MAS' {
+						d := dist + 1
+						dx := x + dir[0] * d
+						dy := y + dir[1] * d
+						if dx < 0 || dx >= xmax || dy < 0 || dy >= ymax || input[dy][dx] != letter {
+							continue dirl
+						}
+						if d == 3 {
+							count++
+						}
+					}
+				}
+			}
+		}
+	}
+
+	println(count)
+}

2024/04/krotki/part2.v

@@ -0,0 +1,32 @@
+module main
+
+import os
+
+fn main() {
+	input := os.get_raw_lines()
+
+	xmax := input[0].len
+	ymax := input.len
+
+	mut count := 0
+	for y, line in input {
+		for x, c in line.bytes() {
+			if x <= 0 || x >= xmax - 1 || y <= 0 || y >= ymax - 1 {
+				continue
+			}
+			if c == `A` {
+				// /
+				diag1 := (input[y - 1][x - 1] == `M` && input[y + 1][x + 1] == `S`)
+					|| (input[y - 1][x - 1] == `S` && input[y + 1][x + 1] == `M`)
+				// \
+				diag2 := (input[y + 1][x - 1] == `M` && input[y - 1][x + 1] == `S`)
+					|| (input[y + 1][x - 1] == `S` && input[y - 1][x + 1] == `M`)
+				if diag1 && diag2 {
+					count++
+				}
+			}
+		}
+	}
+
+	println(count)
+}

known/2024/04/krotki/part1.out

@@ -0,0 +1 @@
+18

known/2024/04/krotki/part2.out

@@ -0,0 +1 @@
+9