1 files changed, 25 insertions, 0 deletions
diff --git a/challenge-321/roger-bell-west/python/ch-1.py b/challenge-321/roger-bell-west/python/ch-1.py
new file mode 100755
index 0000000000..f7482985c5
--- /dev/null
+++ b/challenge-321/roger-bell-west/python/ch-1.py
@@ -0,0 +1,25 @@
+#! /usr/bin/python3
+
+def distinctaverage(a0):
+  a = a0.copy()
+  a.sort()
+  offset = len(a) - 1
+  res = set()
+  for i in range(int(len(a) / 2)):
+    res.add(a[i] + a[offset - i])
+  return len(res)
+
+import unittest
+
+class TestDistinctaverage(unittest.TestCase):
+
+  def test_ex1(self):
+    self.assertEqual(distinctaverage([1, 2, 4, 3, 5, 6]), 1, 'example 1')
+
+  def test_ex2(self):
+    self.assertEqual(distinctaverage([0, 2, 4, 8, 3, 5]), 2, 'example 2')
+
+  def test_ex3(self):
+    self.assertEqual(distinctaverage([7, 3, 1, 0, 5, 9]), 2, 'example 3')
+
+unittest.main()