30 users have solved this problem:

WenDidIAsk, horiseun, Double_Slash, Supermarine_Spitfire, aerobull42, caterpillow, dusky, awu, jenny, programmer123, Uasoni2, Matthewwww, Sirhc_47, user, Lithanium, ndosh, justin_g_20, evanl, dorian, davinformatics, ad_red, finehaveanormalusername, Vivek, Ghetto, OoogaDooga, Nosna, ja_kingy, orac, liangjeremy, Andy