Welcome_to_DUCTF

To compile our code down here, we have to write it in the traditional Australian Syntax: ( Try reading bottom up! ) ¡ƃɐlɟ ǝɥʇ ʇno noʎ ʇuᴉɹd ll,ʇᴉ puɐ ɹǝʇǝɹdɹǝʇuᴉ ǝɥʇ ɥƃnoɹɥʇ ʇᴉ unɹ puɐ ǝɹǝɥ ǝpoɔ sᴉɥʇ ǝʞɐʇ ʇsnJ .ƎWWIפ uɐɔ noʎ NOʞƆƎɹ I puɐ ┴∩Oq∀ʞ˥∀M ƃuᴉoפ '¡H∀N H∀Ǝ⅄ 'ɐʞʞɐ⅄ pɹɐH 'ǝʞᴉl sǝɹnʇɐǝɟ ɔᴉʇsɐʇuɐɟ ƃuᴉɹnʇɐǝℲ .snlԀ snlԀ ǝᴉssn∀ ǝʌᴉsnlɔuᴉ ʎʇᴉuɐɟoɹd ǝɹoɯ 'ɹǝʇsɐɟ 'ɹǝʇʇǝq ǝɥʇ oʇ noʎ ǝɔnpoɹʇuᴉ I uɐɔ ʇnq ++Ɔ ɟo pɹɐǝɥ ǝʌ,no⅄