47 users have solved this problem:

davinformatics, horiseun, programmer123, angus, ndosh, lion, user, bear1212, SirLemonMeringue, Ghetto, dorian, henryho2, ad_red, Double_Slash, Gomango999, justin_g_20, Philip_cpp, Uasoni2, Lithanium, caterpillow, aerobull42, ilt_cp_g, jenny, Matthewwww, dusky, WenDidIAsk, warren_huang, BurwoodChenFamily, chchn2507, anson, awu, Supermarine_Spitfire, yashb_9a3b, AllOuttaLeeks, ja_kingy, Sirhc_47, OoogaDooga, sandworm, ifndef_INDEED_TIS_TRUE_HPP_, liangjeremy, teapot911911, Lucas4732, newai, JustinWang, lsjo, Zimo_Yoyo, finehaveanormalusername,