1. 31.
    0
    +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    ···
  2. 30.
    0
    ++++++++++++++++++++++++++++++
    ···
  3. 29.
    0
    +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    ···
  4. 28.
    0
    ++++++++++++++++++++++++++++++++++++++
    ···
  5. 27.
    0
    ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    ···
  6. 26.
    0
    +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    ···
  7. 25.
    0
    +++++++++++++++++++++++++++++++++++++++++++++++++++
    ···
  8. 24.
    0
    ++++++++++++++++++++++++++++++++++++++++++++++++++++++
    ···
  9. 23.
    -2
    +++++++++++++++++++++++++++++++++++++++++++++++++++
    ···
  10. 22.
    -2
    +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    ···
  11. 21.
    -3
    +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    ···
  12. 20.
    -3
    +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    ···
  13. 19.
    -2
    ++++++++++++++++++++++++++++++++++++++++++++++++++
    ···
  14. 18.
    -1
    ++++++++++++++++++++++++++++++++++++++++++
    ···
  15. 17.
    +1 -1
    +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    ···
  16. 16.
    +1
    ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    ···
  17. 15.
    +1
    +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    ···
  18. 14.
    +1
    +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    ···
  19. 13.
    +1
    ++++++++++++++++++++++++++++++++++++++++++++++++++++++
    ···
  20. 12.
    +1
    +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    ···