feat: solve part one

internal/2022/DayFour/code.go

@@ -0,0 +1,40 @@
+package dayfour
+
+import (
+	"advent-of-code/internal/registry"
+	"fmt"
+	"os"
+	"strings"
+)
+
+func init() {
+	registry.Register("2022D4", ParseInput, PartOne, PartTwo)
+}
+
+func ParseInput(filepath string) []string {
+	content, _ := os.ReadFile(filepath)
+	return strings.Split(string(content), "\n")
+}
+
+func PartOne(data []string) int {
+	count := 0
+	for _, line := range data {
+		parts := strings.Split(line, ",")
+
+		var firstRangeStart, firstRangeEnd, secondRangeStart, secondRangeEnd int
+		fmt.Sscanf(parts[0], "%d-%d", &firstRangeStart, &firstRangeEnd)
+		fmt.Sscanf(parts[1], "%d-%d", &secondRangeStart, &secondRangeEnd)
+
+		minStart := min(firstRangeStart, secondRangeStart)
+		maxEnd := max(firstRangeEnd, secondRangeEnd)
+		if (minStart == firstRangeStart && maxEnd == firstRangeEnd) || (minStart == secondRangeStart && maxEnd == secondRangeEnd) {
+			count++
+		}
+	}
+
+	return count
+}
+
+func PartTwo(data []string) int {
+	return 0
+}