Computer Programming Contest Preparation

    1 0 0 0 0 0 0 0 1 0
    2 0 0 0 0 0 0 0 -1 0
    3 0 0 0 0 0 0 0 0 -1
    4 0 0 0 0 0 0 0 0 1
    5 0 0 0 0 0 0 -1 1 0
    6 0 0 0 0 0 0 -1 0 0
    7