75 users have solved this problem:

he, Gomango999, iamnumber4, mohnishdeshpande, dumpy, quanlin, evanl, lion, bao3108, minhnhatnoe, binbau10, user, alexanyu, Edward, schua704, warren_huang, testcoder, henryho2, ndosh, davinformatics, programmer123, lupispuma74, horiseun, xiaoxiong, dorian, WenDidIAsk, loctildore, numb3r5, Philip_cpp, Matthewwww, Double_Slash, Sirhc_47, Lucas4732, angus, narsue, Vivek, OoogaDooga, awang, ralismark, dusky, Lithanium, sssss, wap, doantronganh2008, GMICE_89khoa, BuMiTa, freecoder_123, longphuctran, Nhom9, dungbetele, Supermarine_Spitfire, junkbot, newai, ad_red, TheEpicCowOfLife, meisean2009, ifndef_INDEED_TIS_TRUE_HPP_, HelperTcell, LightingMcqueen, ilhogwa1, teapot911911, mr_pika, mtpedro, Ghetto, Uasoni2, jakeyg, Muyao_Zhang, Vincent, JustinWang, caterpillow, lsjo, tiko, andy_lin_159, Wram, Andy