Comments

What's the meaning of dsu? I can see it in Problem tags sometimes.

On EdvardCodeforces Round #325, 11 years ago
+3

why still waiting for system test? what is happening?

On SerejaCodeforces Round #167 tutorial, 11 years ago
0

In the problem "Dima and Horses",why does this problem always can be worked out,i means never have the answer with -1.