1. POJ 2724 - Purifying Machine
  2. POJ 3388 - Japanese Puzzle
  3. POJ 3343 - Against Mammoths
  4. POJ 2351 - Time Zones
  5. POJ 1472 - Instant Complexity
  6. POJ 3711 - Mayan Pyramid
  7. POJ 2056 - The Separator in Grid
  8. POJ 1566 - Haiku Review
  9. POJ 2547 - No Tipping
  10. POJ 2679 - Adventurous Driving
  11. POJ 2504 - Bounding box
  12. POJ 1629 - Fillword
  13. POJ 3283 - Card Hands
  14. POJ 3852 - String LD
  15. POJ 1155 - TELE
  16. AOJ 1322 - ASCII Expression
  17. AOJ 1318 - Long Distance Taxi
  18. AOJ 1315 - Gift from the Goddess of Programming
  19. AOJ 1320 - City Merger
  20. POJ 3428 - Formatting function