diff --git a/Klausuren/Sd1/2020winter/First/Solve/src/main/java/de/hdm_stuttgart/mi/sd1/task1/_3_Range.java b/Klausuren/Sd1/2020winter/First/Solve/src/main/java/de/hdm_stuttgart/mi/sd1/task1/_3_Range.java
index f1c6fcd4c3350d36637fe1060854b88fff22101c..9278c0000f9431748e14aaf758c4c25ab6f09f2b 100644
--- a/Klausuren/Sd1/2020winter/First/Solve/src/main/java/de/hdm_stuttgart/mi/sd1/task1/_3_Range.java
+++ b/Klausuren/Sd1/2020winter/First/Solve/src/main/java/de/hdm_stuttgart/mi/sd1/task1/_3_Range.java
@@ -117,7 +117,9 @@ public class _3_Range {
             final int[] tmpResult = new int[rangeEndInclusive - rangeStartInclusive + 1];
             int resultValueCount = 0;
             for (int i = rangeStartInclusive; i <= rangeEndInclusive; i++) {
-                if (!contains(excludedValues, i)) {
+//              if (!contains(excludedValues, i)) {
+                if (!Arrays.stream(excludedValues).anyMatch(  // without contains(...)
+                    Integer.valueOf(i)::equals)) {            // method below.
                     tmpResult[resultValueCount++] = i;
                 }
             }