diff --git a/2024/02/main.go b/2024/02/main.go
index 2076a95..41c339b 100644
--- a/2024/02/main.go
+++ b/2024/02/main.go
@@ -43,7 +43,7 @@ func (r report) isSave() bool {
 		return false
 	}
 
-	for i := 0; i < len(r.levels)-1; i++ { // iterate til second last level
+	for i := range len(r.levels) - 1 { // iterate til second last level
 		if !isValidLevelDifference(r.levels[i], r.levels[i+1]) {
 			return false
 		}