81 users have solved this problem:

testcoder, horiseun, evanl, brchen, lion, ndosh, dumpy, henryho2, bear1212, purplepygmypuff, user, numb3r5, TheEpicCowOfLife, kkorange, tomister99, Yuuron, inj, Philip_cpp, munux, Owen24, davinformatics, WenDidIAsk, RileyO, yuruizi, Unnoficial_James, SirLemonMeringue, BigD, programmer123, eddieee, yeyso, Ghetto, dorian, nickle, ad_red, Salamander, loctildore, Magikarp4000, voiceofburden, Sirhc_47, Double_Slash, Gomango999, Uasoni2, KarL06, Conan, GabrielSong19, BurwoodChenFamily, 321654432765, xav, Vivek, Lithanium, dusky, Supermarine_Spitfire, dylanp, OoogaDooga, caterpillow, finehaveanormalusername, Zimo_Yoyo, jenny, ilt_cp_g, aerobull42, AllOuttaLeeks, Nosna, orac, chchn2507, Matthewwww, OneT_Chen, blx330, warren_huang, PeaceOfCake, anson, asdfghjkl, freecoder_123, BobTheScience, liangjeremy, i3oop, ifndef_INDEED_TIS_TRUE_HPP_, teapot911911, Lucas4732, newai, JustinWang, lsjo,