Update ceil and floor function (#3710)

* Update ceil and floor function

* add end line

* updating DIRECTORY.md

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

maths/floor.py

@@ -1,18 +1,19 @@
+"""
+https://en.wikipedia.org/wiki/Floor_and_ceiling_functions
+"""
+
+
 def floor(x) -> int:
     """
     Return the floor of x as an Integral.
-
     :param x: the number
     :return: the largest integer <= x.
-
     >>> import math
     >>> all(floor(n) == math.floor(n) for n
     ...     in (1, -1, 0, -0, 1.1, -1.1, 1.0, -1.0, 1_000_000_000))
     True
     """
-    return (
-        x if isinstance(x, int) or x - int(x) == 0 else int(x) if x > 0 else int(x - 1)
-    )
+    return int(x) if x - int(x) >= 0 else int(x) - 1
 
 
 if __name__ == "__main__":