mirror of
https://github.com/TheAlgorithms/Python.git
synced 2024-12-18 01:00:15 +00:00
a5000d32ed
* Fix typehints in project_euler/problem01
Squashed commit of the following:
commit 6801d073b31bf702814861cd3b07b634ca295bfa
Author: Archaengel <god11341258@gmail.com>
Date: Mon Oct 5 16:40:10 2020 -0700
Fix typehints in project_euler/problem01
commit 29afc3af114abd1b99dc3f7c8fc99128229db131
Author: Archaengel <god11341258@gmail.com>
Date: Mon Oct 5 15:06:34 2020 -0700
Add typehints and default argument for project_euler/problem_01
* Add default args, typehints, and expand variable names for PE prob 02
* Add style improvements for first solution of PE Problem 02
* Add default arg and typehints for second solution of PE Problem 02
* Add default arg for third solution of PE Problem 02
* Add style improvements for 1st soln of PE problem 03
* Add default arg and typehints for 2nd soln of PE problem 03
* Add default arg for 3rd soln of PE problem 03
* Remove unnecessary newlines
* Remove unnecessary newlines
* Fix end of file for 2nd soln in PE problem 03
* Add style improvements to solutions for PE problem 04
* Restore original newlines in soln for PE problem 04
* Fix punctuation in docstring for PE problem 04
* Restore solution bodies for PE problem 04
* Expand variable names for 2nd soln of PE problem 04
33 lines
880 B
Python
33 lines
880 B
Python
"""
|
|
Problem:
|
|
A palindromic number reads the same both ways. The largest palindrome made from
|
|
the product of two 2-digit numbers is 9009 = 91 x 99.
|
|
|
|
Find the largest palindrome made from the product of two 3-digit numbers which
|
|
is less than N.
|
|
"""
|
|
|
|
|
|
def solution(n: int = 998001) -> int:
|
|
"""Returns the largest palindrome made from the product of two 3-digit
|
|
numbers which is less than n.
|
|
|
|
>>> solution(20000)
|
|
19591
|
|
>>> solution(30000)
|
|
29992
|
|
>>> solution(40000)
|
|
39893
|
|
"""
|
|
answer = 0
|
|
for i in range(999, 99, -1): # 3 digit numbers range from 999 down to 100
|
|
for j in range(999, 99, -1):
|
|
product_string = str(i * j)
|
|
if product_string == product_string[::-1] and i * j < n:
|
|
answer = max(answer, i * j)
|
|
return answer
|
|
|
|
|
|
if __name__ == "__main__":
|
|
print(solution(int(input().strip())))
|