Computer Programming Contest Preparation

    1 1
    2 2
    3 3
    4 8
    5 10
    6 14
    7 123456
    8 947836
    9 -6543
   10     -1
   11     -55
   12     -8
   13     -14
   14     10
   15     -10
   16     122
   17     33
   18     9
   19     13
   20     -8767
   21     56734
   22     12
   23     14
   24