Computer Programming Contest Preparation

    1 9
    2 99
    3 961
    4 9956
    5 99891
    6 999926
    7 1
    8 10
    9 100
   10 1000
   11 10000
   12 100000
   13 1000000
   14 10000000
   15 100000000
   16 61
   17 1100
   18 509
   19 510
   20 1013
   21 0
   22