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一条SQL解数独问题-2025数据库编程大赛-NineData-玖章算术
初赛已结束,未进决赛。 思路说明 对于一句SQL解决数独问题,由于语言的限制,递归只支持BFS,无法实现回溯,基本上只能采用穷举法。 10年前itpub版主newkid就已经提供了利用二进制位高效判断可选数的Oracle程序。我把二进制掩码由number(38)改成高位和低位两 ...
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