[UVA][二分maxflow] 10983 - Buy one, get the rest free
Problem B
Buy one, get the rest free.
Time Limit: 3 seconds
"Whoa! It feels like I'm flying!"
Lrrr
It's year 2258, and the age of airplanes is coming to an end. Everyone is
using teleporters now. In an effort to stay competitive, the last remaining...
