Presentation on theme: "Building trees. The Great Clade Race Long, long ago, in a place far, far away, eight runners (A–H) met in the woods for a foot race. All the runners began."— Presentation transcript:
The Great Clade Race Long, long ago, in a place far, far away, eight runners (A–H) met in the woods for a foot race. All the runners began the race at a single starting point, but, at various points, the course forked. Each series of forks led to a separate finish line at the other end of the woods. At each fork, runners chose which path to take. To keep track of the race, each runner carried a card that was stamped at check-in stations distributed at various points along the paths. Each runner had his or her card stamped at each check-in station they passed. Use these cards to try and reconstruct the course of each runner and the placement of check-in stations.
The Great Clade Race 1. All runners completed the race, i.e., nobody stopped midday along a path. 2. When the paths split, they forked into two new paths, not three or more. 3. Once paths diverged, they never reunited. 4. Check-in stations were located between forks in the paths.