Challenge 201 Task1 LK Python

1 files changed, 28 insertions, 0 deletions

diff --git a/challenge-201/lubos-kolouch/python/ch-1.py b/challenge-201/lubos-kolouch/python/ch-1.py
new file mode 100644
index 0000000000..dc7229e912
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+++ b/challenge-201/lubos-kolouch/python/ch-1.py
@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import unittest
+
+
+def find_missing_numbers(arr):
+    n = len(arr)
+    s = set(arr)
+    missing_numbers = []
+    for i in range(n + 1):
+        if i not in s:
+            missing_numbers.append(i)
+    return missing_numbers
+
+
+# test cases
+class TestMissingNumbers(unittest.TestCase):
+
+    def test_example1(self):
+        self.assertEqual(find_missing_numbers([0, 1, 3]), [2])
+
+    def test_example2(self):
+        self.assertEqual(find_missing_numbers([0, 1]), [2])
+
+
+if __name__ == '__main__':
+    unittest.main()