Add default arg for 3rd soln of PE TheAlgorithms#3

Author: archaengel

Diff for: project_euler/problem_03/sol3.py

@@ -7,7 +7,7 @@
 """
 
 
-def solution(n: int) -> int:
+def solution(n: int = 600851475143) -> int:
     """Returns the largest prime factor of a given number n.
 
     >>> solution(13195)
@@ -41,23 +41,26 @@ def solution(n: int) -> int:
         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.")
+
     i = 2
     ans = 0
+
     if n == 2:
         return 2
+
     while n > 2:
         while n % i != 0:
             i += 1
+
         ans = i
+
         while n % i == 0:
             n = n / i
+
         i += 1
 
     return int(ans)
 
 
 if __name__ == "__main__":
-    # print(solution(int(input().strip())))
-    import doctest
-
-    doctest.testmod()
+    print(solution(int(input().strip())))