44 users have solved this problem:

pony_joe1, user, Gomango999, lion, KarL06, sheep, Ghetto, Uasoni2, Daniel_Sun, anson, aerobull42, henryliang, ryno, AlkhilJohn, RShift, ciple_the_ciple, ad_red, Coconut0727, Conan, aviannight123123, narsue, warren_huang, hirandom, Matthewwww, caterpillow, programmer123, Louis, OoogaDooga, Sirhc_47, Salamander, AjCoder, dusky, Lithanium, leahy99, albertzhong01, ja_kingy, WenDidIAsk, James, ifndef_INDEED_TIS_TRUE_HPP_, s1050613, polyda8, polyda, newai, liangjeremy