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diff --git a/challenge-072/lubos-kolouch/python/ch-1.py b/challenge-072/lubos-kolouch/python/ch-1.py
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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+
+def trailing_zeros(n: int) -> int:
+ count = 0
+ i = 5
+ while n // i >= 1:
+ count += n // i
+ i *= 5
+ return count
+
+
+# Test cases:
+print(trailing_zeros(10)) # Output: 2
+print(trailing_zeros(7)) # Output: 1
+print(trailing_zeros(4)) # Output: 0