One nitpick (and this applies to almost every site of this genre, i.e. geeksforgeeks, hackerrank, etc.): The code listed as "C++" is essentially C with ostreams. If I were interviewing someone and they claimed to know C++, and then used "sizeof(A) / sizeof(A[0])" to get the size of an array, I'd question how much C++ they actually knew. I understand that the focus here is mainly on problem solving and not language sp…
> If I were interviewing someone and they claimed to know C++, and then used "sizeof(A) / sizeof(A[0])" to get the size of an array, I'd question how much C++ they actually knew. Or they've spent a lot of time in embedded systems development. Many of us write rather C-ish C++ because of the limitations of older compilers and the age of the code bases.
Either way I would argue that using sizeof in that way is a sketchy practise.