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Re:我只找经过s的环的时候过不了，要找埋不经过s的才能过，你们呢？In Reply To:我只找经过s的环的时候过不了，要找埋不经过s的才能过，你们呢？ Posted by:posa88 at 2010-12-05 10:27:39 我是spfa,,,结果YES有2种情况,,第一个是s第二次入队列,,这是显然的,,, 第二个是出现负环,,,这个可以这样想,,出现负环就是无限增值的过程,,,就是他能得到任意多的钱,而兑换永远是双向的,,,他有足够的钱说明什么,,,说明他肯定能回到s,,,并且拿到比原来多的钱,,只是他愿不愿意的问题..... Followed by: Post your reply here: |
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