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有重复元素的排列问题 问题描述:设 R={r1,r2, ... .,rn} 是要进行排列的 n 个元素。其中元素 r1,r2, ... .,rn 可能相同。试设计一个算法,列出 R 的所有不同排列。 数据输入:第一行为元素个数 n ,第二行为待排列 n 个元素 结果输出:将计算出的 n 个元素的所有不同的排列输出,并输出排列的总数。 如:输入: 4 aacc 输出: aacc acac acca caac caca ccaa 6
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