Question

is there someone who can help plz be quick​

Answer 1

Answer:

bro jo meri madat karta h me uska hamesha muskil waqt me sath dunga

Answer 2

Mhm, you said to make it more lightweight,so i did but I don't understand what's the problem in using built in functions!

Writing program natively without using built in function will make it more lengthier.

So, what do you want??

And sum can be used as variable, it's not a keyword,and the interpreter won't render it as a function unless you use parentheses after that.