add pseudocode

Author: Kristian Rother

challenges/gcd.rst

@@ -5,6 +5,16 @@ Greatest Common Denominator
 Algorithm <https://en.wikipedia.org/wiki/Euclidean_algorithm>`__ **to
 determine the greatest common denominator of two integers.**
 
+Pseudocode
+----------
+
+1. you have two integer numbers a and b
+2. copy the value of b
+3. set b to the modulo of a and b
+4. set a to the copy of b
+5. if b is not zero, go back to step 2.
+6. a is the greatest common denominator of a and b
+
 Tests
 -----
 
@@ -16,11 +26,5 @@ Use the following code to test your function:
    assert gcd(12, 8) == 4
    assert gcd(42, 12) == 6
 
-Hints:
-------
-
-Translate the `pseudocode from the Wikipedia
-page <https://en.wikipedia.org/wiki/Euclidean_algorithm#Implementations>`__
-into executable code and run it.
 
 *Translated with* `www.DeepL.com <https://www.DeepL.com/Translator>`__