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二分图+spfa (代码是别人的) 阅读全文
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拓扑排序+dfs 很容易发现 对于一个点i 到达它经过的最多的城市数等于前一个节点的数量+1 求出每个点前面最多有多少个点就是答案 阅读全文
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2019-10-21 yeap!!wooooh!! school's sports day!! I had met my best friend just now. This passed my mind,which said "There isn't time, so brief is life, 阅读全文
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Luogu was update this morning. Congratulations,ccsc! emm...juruoxd 阅读全文