What is the problem with this code?

Question

I try to complete the "Paint costs", but I still don't know why I get two test cases wrong. Can anyone correct my code and explain to me? Thank you very much.

My code:

#include <iostream>
using namespace std;

int main() {
int n;
cin >> n;
cout << n*5+40+(n*5+40)/10;
return 0;
}

Answer 1

G'day Huy082125 great attempt.

Have you read the instructions again? Is there something you aren't ensuring?

I have been copy/pasting the instructions into my code as a comment, then checking I have formatting and etc correct.

PS: I know which instruction you have overlooked, let me know if you can't work it out!

Answer 2

I think I know where I got it wrong. The output says that it has to be rounded up to the nearest whole number.