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正向从小到大标号是错的

Posted by RobinW at 2015-02-28 01:52:34 on Problem 3687
比如
4 1
4 1
如果是正向做法,很可能得出4 1 2 3,正解应该是2 3 4 1

附上一组简单的小数据
3 3
2 1
1 3
2 3
答案 2 1 3

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