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摘要: 给定向量化坐标,计算n个线对象两两邻接关系,普通算法时间复杂度为O(n*n);理论最好时间复杂度为O(C),其中C是邻接关系的基数。基于散列桶,给出了建立线对象邻接关系的快速算法,其平均时间复杂度为O(n(1+1/r)),r为算法分配的桶数量与n的比,空间复杂度为O(n)。证明了若不允许使用额外空间,则不可能使用排序算法解决该问题;给出了允许使用额外空间条件下的两遍排序算法,时间复杂度为O(n(lbn+1+2/r))。应用表明快速算法比普通算法速度提高1~3个数量级。