1. 2011-10-19POJ 3523 - The Morning after Halloween
  2. 2011-10-19POJ 3669 - Meteor Shower
  3. 2011-10-19POJ 2684 - Polygonal Line Search
  4. 2011-10-19POJ 1113 - Wall
  5. 2011-10-19POJ 1407 - e-Market
  6. 2011-10-19POJ 3075 - Tic-Tac-Toe
  7. 2011-10-19POJ 1145 - Tree Summing
  8. 2011-10-19POJ 2112 - Optimal Milking
  9. 2011-10-19AOJ 2318 - Set-constructiong Witch
  10. 2011-10-19POJ 3331 - The Idiot of the Year Contest!
  11. 2011-10-19POJ 2269 - Friends
  12. 2011-10-19POJ 1300 - Door Man
  13. 2011-10-19POJ 3107 - Godfather
  14. 2011-10-19POJ 3083 - Children of the Candy Corn
  15. 2011-10-19AOJ 2286 - Farey Sequence
  16. 2011-10-19POJ 1524 - Cowculations
  17. 2011-10-19POJ 3130 - How I Mathematician Wonder What You Are!
  18. 2011-10-19POJ 2218 - Does This Make Me Look Fat?
  19. 2011-10-19AOJ 2293 - Dangerous Tower
  20. 2011-10-19POJ 3007 - Organize Your Train part II