leodev, day 02 (#51)

Author: Le0Developer

2024/02/leodev.v

@@ -0,0 +1,44 @@
+import os
+
+fn main() {
+	content := os.read_file('reports.input')!
+	lines := content.split_into_lines()
+
+	mut safe1 := 0
+	mut safe2 := 0
+	for line in lines {
+		levels := line.split(' ').map(it.int())
+		if is_safe(levels) {
+			safe1++
+			safe2++
+		} else {
+			for i in 0 .. levels.len {
+				mut clone := levels.clone()
+				clone.delete(i)
+				if is_safe(clone) {
+					safe2++
+					break
+				}
+			}
+		}
+	}
+
+	println('part1: ${safe1}')
+	println('part2: ${safe2}')
+}
+
+fn is_safe(levels []int) bool {
+	desc := levels[0] > levels[1]
+	for i in 1 .. levels.len {
+		prev := levels[i - 1]
+		current := levels[i]
+		if (prev > current) != desc {
+			return false
+		}
+		delta := prev - current
+		if delta == 0 || delta > 3 || delta < -3 {
+			return false
+		}
+	}
+	return true
+}

2024/02/reports.input

@@ -0,0 +1,6 @@
+7 6 4 2 1
+1 2 7 8 9
+9 7 6 2 1
+1 3 2 4 5
+8 6 4 4 1
+1 3 6 7 9

known/2024/02/leodev.out

@@ -0,0 +1,2 @@
+part1: 2
+part2: 4