Problem Removed ?

When I try to open problems Little elephant and Balloons I get a 404 error. this is the contest page. and when I try to open this problem in practice mode I get a message saying “We don’t have problems of this category”. Am I the only one getting this ?

here is the editorial :

I got the same. Probably the problem has been removed.

Not only that one but many other problems are also missing.Maybe Codechef is modifying something.