1 files changed, 51 insertions, 0 deletions
diff --git a/challenge-284/lubos-kolouch/python/ch-1.py b/challenge-284/lubos-kolouch/python/ch-1.py
new file mode 100644
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+++ b/challenge-284/lubos-kolouch/python/ch-1.py
@@ -0,0 +1,51 @@
+from typing import List
+import unittest
+
+
+def find_lucky_integer(ints: List[int]) -> int:
+    """
+    Finds the lucky integer in the given list of integers.
+
+    A lucky integer is an integer whose frequency in the array is equal to its value.
+
+    If there are multiple lucky integers, returns the largest one.
+    If no lucky integers are found, returns -1.
+
+    Args:
+        ints (List[int]): A list of integers.
+
+    Returns:
+        int: The lucky integer if found, otherwise -1.
+    """
+    from collections import Counter
+    freq = Counter(ints)
+    lucky_integers = [num for num, count in freq.items() if num == count]
+    if lucky_integers:
+        return max(lucky_integers)
+    else:
+        return -1
+
+
+# Unit Tests
+class TestFindLuckyInteger(unittest.TestCase):
+
+    def test_example1(self):
+        self.assertEqual(find_lucky_integer([2, 2, 3, 4]), 2, 'Example 1')
+
+    def test_example2(self):
+        self.assertEqual(find_lucky_integer([1, 2, 2, 3, 3, 3]), 3,
+                         'Example 2')
+
+    def test_example3(self):
+        self.assertEqual(find_lucky_integer([1, 1, 1, 3]), -1, 'Example 3')
+
+    def test_additional(self):
+        self.assertEqual(find_lucky_integer([5, 5, 5, 5, 5]), 5,
+                         'All same number')
+        self.assertEqual(find_lucky_integer([2, 2, 2, 3, 3]), -1,
+                         'No lucky integer')
+        self.assertEqual(find_lucky_integer([]), -1, 'Empty list')
+
+
+if __name__ == "__main__":
+    unittest.main()