Solution for Day 9

nine/main.go

@@ -0,0 +1,24 @@
+package nine
+
+import "fmt"
+
+type Nine struct {
+	vents vents
+}
+
+func Init(filepath string) *Nine {
+	nine := &Nine{
+		vents: vents{},
+	}
+
+	nine.vents.load(filepath)
+	return nine
+}
+
+func (d *Nine) Answer() string {
+	return fmt.Sprintf("The sum of the risk level of low points is %d", d.vents.sumLowPointRisk())
+}
+
+func (d *Nine) FollowUp() string {
+	return fmt.Sprintf("The product of the three largest basins is %d", d.vents.productLargestBasins())
+}