Day 25, no part 2 lmao

day25/example.txt

@@ -0,0 +1,39 @@
+#####
+.####
+.####
+.####
+.#.#.
+.#...
+.....
+
+#####
+##.##
+.#.##
+...##
+...#.
+...#.
+.....
+
+.....
+#....
+#....
+#...#
+#.#.#
+#.###
+#####
+
+.....
+.....
+#.#..
+###..
+###.#
+###.#
+#####
+
+.....
+.....
+.....
+#....
+#.#..
+#.#.#
+#####

day25/go.mod

@@ -0,0 +1,3 @@
+module stevenlr.com/aoc2024/day25
+
+go 1.23.3

day25/main.go

@@ -0,0 +1,64 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+)
+
+func main() {
+	fmt.Println(part1(readData("example.txt")), 3)
+	fmt.Println(part1(readData("data.txt")), 3)
+}
+
+type Data struct {
+	keys  [][5]int
+	locks [][5]int
+}
+
+func fits(k, l [5]int) bool {
+	for i := range k {
+		if k[i]+l[i] > 5 {
+			return false
+		}
+	}
+	return true
+}
+
+func part1(data Data) (count int) {
+	for _, k := range data.keys {
+		for _, l := range data.locks {
+			if fits(k, l) {
+				count++
+			}
+		}
+	}
+	return
+}
+
+func readData(fileName string) (data Data) {
+	data = Data{}
+	fp, _ := os.Open(fileName)
+	scanner := bufio.NewScanner(fp)
+
+	for scanner.Scan() {
+		isKey := scanner.Text()[0] == '.'
+		code := [5]int{0, 0, 0, 0, 0}
+		for i := 0; scanner.Scan() && i < 5; i++ {
+			line := scanner.Text()
+			for j := range 5 {
+				if line[j] == '#' {
+					code[j]++
+				}
+			}
+		}
+		scanner.Scan()
+		if isKey {
+			data.keys = append(data.keys, code)
+		} else {
+			data.locks = append(data.locks, code)
+		}
+	}
+
+	return
+}

go.work

@@ -17,6 +17,7 @@ use (
 	./day22
 	./day23
 	./day24
+	./day25
 	./day2
 	./day3
 	./day4