Python palindrome challenge.

Question

I'm doing a challenge. I have to find the largest palindrome (explained below) from the product of 3-digit numbers.

Palindrome - is a word/number that reads the same in forward/backward direction. e.g. 0110 , madam.

The largest 2-digit palindrom is 9009. Resulted in a calculation of: 91*99 = 9009.

I have the following code, any suggestions?

https://code.sololearn.com/cnqcPaOMXbpK/?ref=app

Answer 1

Just a "different" school of thought...
You could save time and only compare half.
If the first half of the word matches the first half of the reversed word, it's a match. Comparing the whole thing is redundant.

Answer 2

Lamron ,

i did some tests in case of performance and memory consumption. see some comments and the code in the file:

https://code.sololearn.com/c5Sbq5KqDdZW/?ref=app

Answer 3

Ausgrindtube ,

how much time can be saved by applying your idea? did you do any tests for this?

Answer 4

Slice in reverse is m[ : : -1]

Answer 5

Lothar I'm way too lazy to do anything actually useful like that, sorry 😅
I imagine on most machines it wouldn't save much time nor computing resources, how long can a word be, right?

Answer 6

Simple mistake, but changes a lot....

Thanks Jayakrishna 🇮🇳

Answer 7

Lothar , yes your code is optimised well indeed, and I see how you did it. Thanks for showing optimised alternative

Answer 8

Thanks Mirielle

Answer 9

I took a rest though about it, tried again and it worked. Thanks for guidance!