Question 1
There are three islands (the dark-gray regions) in the sea as shown below.
Two birds are on island C and want to reach island A. We know that:
- The birds can move only along the edges of the cells, up/down/left/right, and always choose the fastest route.
- The black bird can fly over 2 sea cells per hour and needs 1 hour of rest on land after flying across 4 cells.
- The white bird can fly over 4 sea cells per hour and needs 2 hours of rest on land after flying across 4 cells.
- On land, both birds walk at 1 cell per hour.
If they start at the same time, which bird reaches island A sooner?
Two birds are on island C and want to reach island A. We know that:
- The birds can move only along the edges of the cells, up/down/left/right, and always choose the fastest route.
- The black bird can fly over 2 sea cells per hour and needs 1 hour of rest on land after flying across 4 cells.
- The white bird can fly over 4 sea cells per hour and needs 2 hours of rest on land after flying across 4 cells.
- On land, both birds walk at 1 cell per hour.
If they start at the same time, which bird reaches island A sooner?