65 users have solved this problem:

he, Gomango999, iamnumber4, dumpy, quanlin, warren_huang, WC6479, lion, uylulu, harrysun2006, user, Edward, Yuuron, YGuo02, testcoder, WenDidIAsk, evanl, tiko, Yichen, henryho2, ndosh, davinformatics, jqxcz, No2Banker, programmer123, xiaoxiong, dorian, Philip_cpp, Wilsonytan14, moch, horiseun, loctildore, numb3r5, robinz, Sirhc_47, Double_Slash, Matthewwww, Lucas4732, Ghetto, Uasoni2, pony_joe1, OoogaDooga, ralismark, Lithanium, PeaceOfCake, dusky, ifndef_INDEED_TIS_TRUE_HPP_, junkbot, Supermarine_Spitfire, newai, ad_red, TheEpicCowOfLife, ProperDiamond, Hugo_Brosnahan, mtpedro, AllOuttaLeeks, Andy, no_talk_me_i_angy, ericgw, ilhogwa1, RabbityCarroty, HJ1549, flyswatter, teapot911911, RShift,