30 users have solved this problem:

lion, trangim, horiseun, evanl, ja_kingy, dumpy, dylanp, user, ndosh, Ghetto, programmer123, testcoder, Double_Slash, dorian, Matthewwww, Philip_cpp, Trekr, Uasoni2, ad_red, justin_g_20, awu, Lithanium, Supermarine_Spitfire, davinformatics, OoogaDooga, WenDidIAsk, SirLemonMeringue, nosna, amanda, newai,