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题面 "原题" Solution cpp include include include include include include include define ll long long define file(a) freopen(a".in","r",stdin);freopen(a".o 阅读全文
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题面 "原题" Solution cpp include include include include include include include define ll long long define re register using namespace std; inline int gi 阅读全文
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题面 "原题" Solution 考虑对于每一个环一定是满足要求的，那么他在这个环内而且所有的奶牛都要喜欢它，所以他一定没有出边且这个环是唯一的。 cpp include include include include include include include define ll long l 阅读全文