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在 Cormen 的算法一书中,它给出了一种寻找最长子序列的算法。填充表格时,它从右下角而不是左上角开始:简而言之,它从两个序列的最后一个元素而不是第一个元素开始寻找两个序列的最长子序列。这背后是否有一个绝妙的理由(更高效等)?