[Cs3] Correction in Student class

[Mikhail Nesterenko]

This is fixed, btw,
--
Mikhail

Tamim Islam wrote:
> CS3 student,
> 
> The less than function in student class is as following at this moment:
> 
>    friend bool operator< (Student left, Student right){
>       return left.lastName_ < right.lastName_ ||
>          (left.lastName_ == right.lastName_ &&
>           left.firstName_ < *left*.firstName_);
>    }
> 
> It should be:
> 
>    friend bool operator< (Student left, Student right){
>       return left.lastName_ < right.lastName_ ||
>          (left.lastName_ == right.lastName_ &&
>           left.firstName_ < *right*.firstName_);
>    }
> 
> Thanks