Computer Programming Contest Preparation

    1 4
    2 -1 -2 -3 -4
    3     -5 -6 -7 -8
    4     -9 -10 -11 -12
    5     -13 -14 -15 -16
    6     5
    7     1 -61 5126 612 6
    8     41 6 7 2 -7
    9     1 73 -62 678 1
   10     7 -616136 61 -83 724
   11     -151 6247 872 2517 8135
   12     4
   13     0 -2 -7 0
   14     9 2 -6 2
   15     -4 1 -4  1
   16     -1 8  0 -2
   17