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刚过题...留爪...顺便留一点思路...1.这道题毫无疑问是拓扑排序+回路检测,先检测后排序 2.当发现存在回路或得出序列时立刻输出,此test case内的后续数据不改变结果 3.有可能在最后一行关系得出矛盾 或者有更好的想法...也希望大家贴出来吧... Followed by: Post your reply here: |
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