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关于题目的疑惑,请各位高手帮忙看看一下数据的输出结果是什么

Posted by eleana at 2005-10-29 11:27:37 on Problem 2692
第一组数据:
4
a
b
c
d
1 2 3 4
2 1 3 4
第二组数据:
4
a
b
c
d
1 3 2 4
2 4 3 1
第三组数据:
2
a
b
1 2
2 1

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