Any better ways

Question

array manipulations
https://code.sololearn.com/cKb6F794WFRK/?ref=app

Answer 1

Yes, of course!
By using ranged based for loop your code becomes more readable and easy to maintain. In addition to that, having a compact code is a gem when it comes to comparing two programs which are doing the same thing but with the different number of instructions. (This is just one possibility for your code)

https://code.sololearn.com/cjwMg9MQNmuO

Answer 2

write a code to multiply two matrix and return 3rd matrix
there is a function too in mayrix class to display matices