2024 day 8 Complete!

2024/day08/main.go

@@ -0,0 +1,59 @@
+package main
+
+import (
+	"fmt"
+
+	h "git.bullercodeworks.com/brian/adventofcode/helpers"
+)
+
+func main() {
+	inp := h.StdinToStringSlice()
+	part1(inp)
+	fmt.Println()
+	part2(inp)
+}
+
+func part1(inp []string) {
+	c := h.StringSliceToCoordByteMap(inp)
+	anC := h.StringSliceToCoordByteMap(inp)
+	nodes := c.FindAllNot('.')
+	for k, bt := range nodes {
+		fNodes := c.FindAll(bt)
+		for _, nd := range fNodes {
+			if k.Equals(nd) {
+				continue
+			}
+			diff := k.Sub(nd)
+			an := k.Add(diff)
+			if anC.ContainsCoord(an) {
+				anC.Put(k.Add(diff), '#')
+			}
+		}
+	}
+	fmt.Println("# Part 1")
+	fmt.Println("Antinodes:", anC.Count('#'))
+}
+
+func part2(inp []string) {
+	c := h.StringSliceToCoordByteMap(inp)
+	anC := h.StringSliceToCoordByteMap(inp)
+	nodes := c.FindAllNot('.')
+	for k, bt := range nodes {
+		fNodes := c.FindAll(bt)
+		for _, nd := range fNodes {
+			anC.Put(nd, '#')
+			anC.Put(k, '#')
+			if k.Equals(nd) {
+				continue
+			}
+			diff := k.Sub(nd)
+			an := k.Add(diff)
+			for anC.ContainsCoord(an) {
+				anC.Put(an, '#')
+				an = an.Add(diff)
+			}
+		}
+	}
+	fmt.Println("# Part 2")
+	fmt.Println("Antinodes:", anC.Count('#'))
+}