From 6939538a41202bf05f958c9c2d7c1c20e2f87430 Mon Sep 17 00:00:00 2001
From: Margaret <62753112+meg-1@users.noreply.github.com>
Date: Wed, 10 May 2023 21:55:48 +0300
Subject: [PATCH] adding the remove digit algorithm (#6708)

---
 maths/remove_digit.py | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 maths/remove_digit.py

diff --git a/maths/remove_digit.py b/maths/remove_digit.py
new file mode 100644
index 000000000..db14ac902
--- /dev/null
+++ b/maths/remove_digit.py
@@ -0,0 +1,37 @@
+def remove_digit(num: int) -> int:
+    """
+
+    returns the biggest possible result
+    that can be achieved by removing
+    one digit from the given number
+
+    >>> remove_digit(152)
+    52
+    >>> remove_digit(6385)
+    685
+    >>> remove_digit(-11)
+    1
+    >>> remove_digit(2222222)
+    222222
+    >>> remove_digit("2222222")
+    Traceback (most recent call last):
+    TypeError: only integers accepted as input
+    >>> remove_digit("string input")
+    Traceback (most recent call last):
+    TypeError: only integers accepted as input
+    """
+
+    if not isinstance(num, int):
+        raise TypeError("only integers accepted as input")
+    else:
+        num_str = str(abs(num))
+        num_transpositions = [list(num_str) for char in range(len(num_str))]
+        for index in range(len(num_str)):
+            num_transpositions[index].pop(index)
+        return max(
+            int("".join(list(transposition))) for transposition in num_transpositions
+        )
+
+
+if __name__ == "__main__":
+    __import__("doctest").testmod()