Computer Programming Contest Preparation

    1 3 1 2 3
    2 3 -1 -2 -3
    3 3 1 2 4
    4 4 2 4 6 10
    5 3 -1 -2 -4
    6 10 1 1 1 1 1 1 1 1 1 4
    7 10 1 -1 1 -1 1 -1 -1 1 1 1 10 1 -1 1 -1 1 -1 -1 1 1 -3
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