1 files changed, 36 insertions, 0 deletions
diff --git a/challenge-236/deadmarshal/java/Ch2.java b/challenge-236/deadmarshal/java/Ch2.java
new file mode 100644
index 0000000000..a37ae7edc4
--- /dev/null
+++ b/challenge-236/deadmarshal/java/Ch2.java
@@ -0,0 +1,36 @@
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class Ch2 {
+  public static void main(String[] args) {
+    ArrayList<Integer> arr1 = new ArrayList<>(
+      List.of(4,6,3,8,15,0,13,18,7,16,14,19,17,5,11,1,12,2,9,10));
+    ArrayList<Integer> arr2 = new ArrayList<>(
+      List.of(0,1,13,7,6,8,10,11,2,14,16,4,12,9,17,5,3,18,15,19));
+    ArrayList<Integer> arr3 = new ArrayList<>(
+      List.of(9,8,3,11,5,7,13,19,12,4,14,10,18,2,16,1,0,15,6,17));
+    System.out.println(array_loops(arr1));
+    System.out.println(array_loops(arr2));
+    System.out.println(array_loops(arr3));
+  }
+
+  private static int array_loops(List<Integer> list) {
+    int count = 0, i = 0;
+    List<Integer> indices =
+      new ArrayList<Integer>(Collections.nCopies(list.size(), -1));
+    for(; i < list.size(); ++i)
+    {
+      if(indices.get(i) == -1)
+      {
+        count++;
+        while(indices.get(i) == -1)
+        {
+          indices.set(i,1);
+          i = list.get(i);
+        }
+      }
+    }
+    return count;
+  }
+}