int main(){

printf("i??k?k??u?u???nnnn\n??k k???u?u???n?n\ni??kk???u?u???n?n\ni??k k???u?uu??n?n\ni??k?k??uuuu u??n?n");

練習(xí)題，這里直接復(fù)制粘貼就好