1 files changed, 35 insertions, 0 deletions
diff --git a/challenge-254/lubos-kolouch/python/ch-1.py b/challenge-254/lubos-kolouch/python/ch-1.py
new file mode 100644
index 0000000000..8a3cb00ca7
--- /dev/null
+++ b/challenge-254/lubos-kolouch/python/ch-1.py
@@ -0,0 +1,35 @@
+def is_power_of_three(n: int) -> bool:
+    """
+    Checks if a positive integer is a power of three.
+
+    Args:
+        n: The positive integer to check.
+
+    Returns:
+        True if n is a power of three, False otherwise.
+
+    Raises:
+        ValueError: If n is not a positive integer.
+    """
+
+    if n <= 0:
+        raise ValueError("Input must be a positive integer.")
+
+    # If n is 1, it's trivially a power of three
+    if n == 1:
+        return True
+
+    # Repeatedly divide n by 3 until it reaches 1 or becomes negative
+    while n % 3 == 0:
+        n //= 3
+
+    # If n is 1 after the division, it was a power of three
+    return n == 1
+
+
+# Assert tests (corrected)
+assert is_power_of_three(27) is True
+assert is_power_of_three(81) is True
+assert is_power_of_three(6) is False
+
+print("All tests passed!")