I have found this problem very frequently. Discovering problems on Brilliant these days became quite difficult for me. A set of few problems keep on coming back again and again. For the same, it is my appeal to the Brilliant authority to form a way out so that the "old"(veteran) problems which are really good, can be discovered easily. What I mean by that is the problems should only be those which are unsolved.
Thanks in advance! \(\ddot \smile\)