Add default arg and typehints for 2nd soln of PE TheAlgorithms#3

Author: archaengel

Diff for: project_euler/problem_03/sol2.py

@@ -7,7 +7,7 @@
 """
 
 
-def solution(n):
+def solution(n: int = 600851475143) -> int:
     """Returns the largest prime factor of a given number n.
 
     >>> solution(13195)
@@ -41,15 +41,19 @@ def solution(n):
         raise TypeError("Parameter n must be int or passive of cast to int.")
     if n <= 0:
         raise ValueError("Parameter n must be greater or equal to one.")
+
     prime = 1
     i = 2
+
     while i * i <= n:
         while n % i == 0:
             prime = i
             n //= i
         i += 1
+
     if n > 1:
         prime = n
+
     return int(prime)