1 files changed, 28 insertions, 0 deletions
diff --git a/challenge-241/deadmarshal/java/Ch1.java b/challenge-241/deadmarshal/java/Ch1.java
new file mode 100644
index 0000000000..f4ae47bca6
--- /dev/null
+++ b/challenge-241/deadmarshal/java/Ch1.java
@@ -0,0 +1,28 @@
+import java.util.ArrayList;
+import java.util.List;
+
+public class Ch1 {
+  public static void main(String[] args) {
+    ArrayList<Integer> list1 =
+      new ArrayList<>(List.of(0,1,4,6,7,10));
+    ArrayList<Integer> list2 =
+      new ArrayList<>(List.of(4,5,6,7,8,9));
+    System.out.println(arithmetic_triplets(list1,3));
+    System.out.println(arithmetic_triplets(list2,2));
+  }
+
+  private static int arithmetic_triplets(List<Integer> list,int diff){
+    int count = 0;
+    for(int i = 0; i < list.size(); ++i) {
+      for(int j = i+1; j < list.size(); ++j) {
+	for(int k = j+1; k < list.size(); ++k) {
+	  if((list.get(j) - list.get(i) == diff) &&
+	     (list.get(k) - list.get(j) == diff))
+	    count++;
+	}
+      }
+    }
+    return count;
+  }
+}
+