Computer Programming Contest Preparation

    1 Yes
    2 No
    3 Yes
    4 Yes
    5 Yes
    6 Yes
    7 
    8 Yes
    9 Yes
   10 Yes
   11 Yes
   12 No
   13 Yes
   14 
   15 Yes
   16 Yes
   17 Yes
   18 Yes
   19 No
   20 Yes
   21 Yes
   22 Yes
   23 Yes
   24 Yes
   25 No
   26 Yes
   27 No
   28 No
   29 Yes
   30 Yes
   31 No
   32 Yes
   33 No
   34 No
   35 No
   36 No
   37 No
   38 Yes
   39 
   40 Yes
   41 Yes
   42