Merge remote-tracking branch 'upstream/master'

1 files changed, 20 insertions, 0 deletions

diff --git a/challenge-243/deadmarshal/java/Ch1.java b/challenge-243/deadmarshal/java/Ch1.java
new file mode 100644
index 0000000000..ae2eb24e29
--- /dev/null
+++ b/challenge-243/deadmarshal/java/Ch1.java
@@ -0,0 +1,20 @@
+import java.util.ArrayList;
+import java.util.List;
+
+public class Ch1 {
+  public static void main(String[] args) {
+    ArrayList<Integer> list1 = new ArrayList<>(List.of(1,3,2,3,1));
+    ArrayList<Integer> list2 = new ArrayList<>(List.of(2,4,3,5,1));
+    System.out.println(reverse_pairs(list1));
+    System.out.println(reverse_pairs(list2));
+  }
+
+  private static int reverse_pairs(List<Integer> list) {
+    int count = 0;
+    for(int i = 0; i < list.size()-1; ++i)
+      for(int j = i+1; j < list.size(); ++j)
+	if(list.get(i) > 2 * list.get(j)) count++;
+    return count;
+  }
+}
+