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  • 分享一道阿里巴巴(蚂蚁金服)Java笔试题

    编写一个函数验证一个给定的9x9 整数矩阵是否符合数独的特性:
    a) 每个单元格数字为 1-9
    b) 每行的9个数不重复
    c) 每列的9个数不重复
    d) 如图中分割的9个小3x3矩阵,每个小矩阵里9个数不重复

    +-----+-----+-----+-----+-----+-----+-----+-----+-----+
    |  x  |  x  |  x  |     |     |     |  x  |  x  |  x  |
    +-----+-----+-----+-----+-----+-----+-----+-----+-----+
    |  x  |  x  |  x  |     |     |     |  x  |  x  |  x  |
    +-----+-----+-----+-----+-----+-----+-----+-----+-----+
    |  x  |  x  |  x  |     |     |     |  x  |  x  |  x  |
    +-----+-----+-----+-----+-----+-----+-----+-----+-----+
    |     |     |     |  x  |  x  |  x  |     |     |     |
    +-----+-----+-----+-----+-----+-----+-----+-----+-----+
    |     |     |     |  x  |  x  |  x  |     |     |     |
    +-----+-----+-----+-----+-----+-----+-----+-----+-----+
    |     |     |     |  x  |  x  |  x  |     |     |     |
    +-----+-----+-----+-----+-----+-----+-----+-----+-----+
    |  x  |  x  |  x  |     |     |     |  x  |  x  |  x  |
    +-----+-----+-----+-----+-----+-----+-----+-----+-----+
    |  x  |  x  |  x  |     |     |     |  x  |  x  |  x  |
    +-----+-----+-----+-----+-----+-----+-----+-----+-----+
    |  x  |  x  |  x  |     |     |     |  x  |  x  |  x  |
    +-----+-----+-----+-----+-----+-----+-----+-----+-----+
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  • 原文地址:https://www.cnblogs.com/chyg/p/8652031.html
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