[UVA][樹形dp] 1220 - Party at Hali-Bula
Dear Contestant,
I'm going to have a party at my
villa at Hali-Bula to celebrate my retirement from BCM. I wish I could
invite all my co-workers, but imagine how an employee can enjoy a party
when he finds his boss among the guests! So, I decide not to invite both
...
