1 files changed, 26 insertions, 0 deletions
diff --git a/challenge-306/roger-bell-west/python/ch-2.py b/challenge-306/roger-bell-west/python/ch-2.py
new file mode 100755
index 0000000000..d16bb157a1
--- /dev/null
+++ b/challenge-306/roger-bell-west/python/ch-2.py
@@ -0,0 +1,26 @@
+#! /usr/bin/python3
+
+def lastelement(a):
+  b = a
+  while True:
+    b.sort()
+    f = b.pop()
+    s = b.pop()
+    if f > s:
+      b.append(f - s)
+    if len(b) == 0:
+      return 0
+    if len(b) == 1:
+      return b[0]
+
+import unittest
+
+class TestLastelement(unittest.TestCase):
+
+  def test_ex1(self):
+    self.assertEqual(lastelement([3, 8, 5, 2, 9, 2]), 1, 'example 1')
+
+  def test_ex2(self):
+    self.assertEqual(lastelement([3, 2, 5]), 0, 'example 2')
+
+unittest.main()