42 users have solved this problem:

testcoder, pony_joe1, lion, bear1212, brchen, Salamander, Magikarp4000, awu, davinformatics, loctildore, evanl, ndosh, TheEpicCowOfLife, user, phoebe, dorian, RileyO, ETK, yixiu, henryho2, programmer123, horiseun, dumpy, xiaoxiong, lilu, ImMcHe, sheep, Gomango999, KarL06, Matthewwww, caterpillow, BurwoodChenFamily, Double_Slash, finehaveanormalusername, Lithanium, Uasoni2, dusky, SirLemonMeringue, WenDidIAsk, Vedang, ja_kingy, OneT_Chen