Day 7 solution

seven/main.go

@@ -0,0 +1,26 @@
+package seven
+
+import "fmt"
+
+type Seven struct {
+	crabs crabs
+}
+
+func Init(filepath string) *Seven {
+	seven := &Seven{
+		crabs: crabs{},
+	}
+
+	seven.crabs.load(filepath)
+	return seven
+}
+
+func (d *Seven) Answer() string {
+	fuelUsed := d.crabs.align(false)
+	return fmt.Sprintf("Used %d fuel to align", fuelUsed)
+}
+
+func (d *Seven) FollowUp() string {
+	fuelUsed := d.crabs.align(true)
+	return fmt.Sprintf("Used %d fuel to align", fuelUsed)
+}