POW-1: Sune Kristian Jakobsen, Philipp Lampe (Univ of Bonn), and Paul Shearer (Univ of Michigan).

POW-2: Sune Kristian Jakobsen, Philipp Lampe (Univ of Bonn), and Paul Shearer (Univ of Michigan). Solutions to part 1 given by Jimbo Doe, Jason Dyer, and Marni Sheppeard.

POW-3: Rod Carvalho, Jöel Duet, Philipp Lampe (Univ of Bonn), Gantumur Tsogtgerel (UC San Diego), and Nilay Vaish.

POW-4: David Eppstein, Sune Kristian Jakobsen, and Philipp Lampe (Univ of Bonn).

POW-5: Balkrishna Patankar, Akhil Ravidas, Animesh Datta (Univ of New Mexico), Philipp Lampe (Univ of Bonn), Kenneth Chan, and Nilay Vaish.

POW-6: No entries.

POW-7: Kenneth Chan (Univ. of New South Wales), Arin Chaudhuri, Sune Kristian Jakobsen, Philipp Lampe (Univ of Bonn), Peter LeFanu Lumsdaine (Carnegie Mellon University), Paul Shearer (Univ of Michigan).

POW-8: Arin Chaudhuri, Sune Kristian Jakobsen, Nilay Vaish.

POW-9: Arin Chaudhuri, Ashwin Kumar, Philipp Lampe (Univ of Bonn), Vladimir Nesov, Américo Tavares, Nathan Williams, Henry Wilton.

POW-10: Arin Chaudhuri, Philipp Lampe (Univ of Bonn), Paul Shearer (Univ of Michigan), Simon Tyler, Nilay Vaish.

POW-11: Philipp Lampe (Univ of Bonn).

POW-12: Arin Chaudhuri, David Eppstein, Sune Kristian Jakobsen (Univ of Copenhagen), Philipp Lampe (Univ of Bonn).