add result struct to package one

remove unnecessary assignments in util.splitNumber

day-11/internal/one/result.go

@@ -0,0 +1,29 @@
+package one
+
+import "fmt"
+
+const (
+	flip = iota
+	split
+	multiply
+)
+
+type result struct {
+	kind  int
+	left  int
+	right int
+}
+
+func (r result) String() string {
+	var kindStr string
+	switch r.kind {
+	case flip:
+		kindStr = "flip"
+	case split:
+		kindStr = "split"
+	case multiply:
+		kindStr = "multiply"
+	}
+
+	return fmt.Sprintf("kind: %s left: %d right: %d", kindStr, r.left, r.right)
+}

day-11/internal/one/solve.go

@@ -28,11 +28,14 @@ func Solve(buf []byte) (int, error) {
 		next := queue.New[int]()
 		for !old.IsEmpty() {
 			n := old.Dequeue()
-			left, right, ok := applyRules(n)
+			r := applyRules(n)
-			if ok {
+			switch r.kind {
-				next.Enqueue(left)
+			case flip, multiply:
+				next.Enqueue(r.right)
+			case split:
+				next.Enqueue(r.left)
+				next.Enqueue(r.right)
 			}
-			next.Enqueue(right)
 		}
 
 		old = next
@@ -42,14 +45,14 @@ func Solve(buf []byte) (int, error) {
 	return old.Len(), nil
 }
 
-func applyRules(num int) (int, int, bool) {
+func applyRules(num int) result {
 	switch num := num; {
 	case num == 0:
-		return 0, 1, false
+		return result{flip, 0, 1}
 	case lenItoa(num)%2 == 0:
 		left, right := splitNumber(num)
-		return left, right, true
+		return result{split, left, right}
 	default:
-		return 0, num * magic, false
+		return result{multiply, 0, num * magic}
 	}
 }

day-11/internal/one/util.go

@@ -44,10 +44,7 @@ func mustConv(s string) int {
 func splitNumber(n int) (int, int) {
 	factor := int(math.Pow10(lenItoa(n) / 2))
 
-	right := n % factor
+	return int(n / factor), n % factor
-	left := int(n / factor)
-
-	return left, right
 }
 
 func lenItoa(n int) int {

day-11/internal/two/util.go

@@ -44,10 +44,7 @@ func mustConv(s string) int {
 func splitNumber(n int) (int, int) {
 	factor := int(math.Pow10(lenItoa(n) / 2))
 
-	left := int(n / factor)
+	return int(n / factor), n % factor
-	right := n % factor
-
-	return left, right
 }
 
 func lenItoa(n int) int {