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Why RE?

Posted by zgw at 2007-01-13 23:36:53 on Problem 1159
这个题用LCS求出输入的字符串和它的反向字符串的最长公共子序列
然后输出n-d[n][n];
这个算法有问题么?
数组开到[5001][5001]应该够了吧 为什么是RE呢?
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