Recently, I saw a few problems which I really can't solve. When I was about to view the solution to learn something beyond my knowledge, I found that the problems, especially higher levels, don't have any solutions or the solution is just a bunch of code which is very annoying. I think there are some other users like me who just cannot solve the problem. Worse, we can't even learn when we wanted to.
So, what I'm going to say about is to encourage more people to write a solution. Yes, you are the one I am talking to! No matter what Level you're in, when you solved a problem, and the solutions provided from other users are just writing the answer, not written clearly in LaTeX or different from your solution, don't hesitate! Just take out your pen (keyboard) and write (type) down your solution!
One of the many things that users of brilliant.org amazed me is when they just write their solution in the comment box (Before this new layout, it used to be like this). This means that they write their solution is not for "vote up's" but to let more people know about the other ways to solve the problem and this new version of brilliant.org is just the best for them. I hope that more people can write solutions. In higher levels, @JonHaussmann, @VishnuramLeonardodavinci are some of the users I always found them on the "Recent Solver", I hope you all can provide more solutions! Others like @TrevorB. and @MursalinHabib are also great solution writers!
Writing solution is not something that wasted your time. By writing solutions, you can conclude your ideas and the rail of your train of thoughts will be more smooth!
You can mention some great solution writers below!