I was trying to add my own created codeforces polygon problem in vjudge contest but failed.
I invited vjudge1, vjudge2, vjudge3, vjudge4, vjudge5 to my mashup contest.
But at the time of creating a new contest, when I put my problem id (214531A), vjudge says, "No such problem".
Whats the reason? How to fix it?