Force max flights per star

strategies/simple.go

@@ -11,9 +11,11 @@ type SimpleStrategy struct {
 }
 
 func (s *SimpleStrategy) Execute(stars[] models.Star, flights[] models.Flight, links[] models.Link) {
-	total := 0
 
 	for i, s := range stars {
+		// Maximum flights per star per round is 3
+		total := 0
+
 		// Check if source star is already in flight
 		inFlight := false
 		for _, f := range flights {