Question 4
The city has seven parks connected by ten one-way roads, as shown. Currently a resident can travel from any park to any other park.
Beaver wants to close one road for an art exhibition. Which roads could be closed, one at a time, while preserving travel between every pair of parks?
Beaver wants to close one road for an art exhibition. Which roads could be closed, one at a time, while preserving travel between every pair of parks?