Computer Programming Contest Preparation

    1 1       2       3       4       5       6
    2 0       0       0       0      0        0
    3 
    4 1 2
    5 
    6 1       -1      0       0       0       0
    7 
    8 3 4
    9 
   10 1       -1      3       -3      0       0
   11 
   12 =1 3
   13 
   14 1       -1      -1      -3      0       0
   15 
   16 =1 4
   17 
   18 1       -1      -1      -1      0       0
   19 
   20 =2 3
   21 
   22 1       -1      -1      -3      0       0
   23 
   24 = 2 4
   25 
   26 1       -1      -1      -1      0       0
   27 
   28 = 3 5
   29 
   30 1       -1      3       -3      -3      0
   31 
   32 =1 5
   33 
   34 1       -1      -1       -3      -1     0
   35 
   36 4 6
   37 
   38 1       -1      -1      -3      -1      -3
   39 
   40 5 6
   41 
   42 1       -1      -1      -3      -1      -1
   43