85 users have solved this problem:

testcoder, davinformatics, horiseun, ndosh, programmer123, bear1212, angus, lion, user, Ghetto, grossly_overconfident, Magikarp4000, BigD, SirLemonMeringue, justin_g_20, Salamander, awu, loctildore, evanl, phoebe, TheEpicCowOfLife, henryho2, yixiu, RileyO, dorian, ETK, onlytaiga, dumpy, yeyso, numb3r5, dusky, A, mr_perfect, Gomango999, xiaoxiong, sheep, lilu, eds, Philip_cpp, ImMcHe, Mystic03, BobTheScience, ZeroCoolCorp, EntityPlantt, AndrijaMlad, VMaksimoski008, Matthewwww, warren_huang, abyssmall, Uasoni2, ad_red, KarL06, Conan, jbroeksteeg, caterpillow, BurwoodChenFamily, laeequejamdar, spdskatr, Lithanium, Double_Slash, Vedang, finehaveanormalusername, ngrace, WenDidIAsk, HappyCapybara, chchn2507, OneT_Chen, aerobull42, jenny, blx330, ja_kingy, Nonoze, Supermarine_Spitfire, Nosna, OoogaDooga, Lucas4732, inj, mtpedro, meisean2009, amanda, newai, liangjeremy, a_dude_who_fails_to_register, lsjo, aviannight123123,