22 users have solved this problem:

Double_Slash, caterpillow, awu, programmer123, Matthewwww, numb3r5, justin_g_20, evanl, dorian, davinformatics, Ghetto, Lithanium, 31, Nosna, ja_kingy, Uasoni2, OoogaDooga, Supermarine_Spitfire, RUSH_D_CAT, liangjeremy, amanda, newai,