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[TOC] Beautiful Numbers PROBLEM 题目描述 NIBGNAUK is an odd boy and his taste is strange as well. It seems to him that a positive integer number is beauti 阅读全文
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[TOC] Milking Order @USACO 2018 US Open Contest, Gold/upc_exam_6348 PROBLEM 题目描述 Farmer John's N cows (1≤N≤105), numbered 1…N as always, happen to hav 阅读全文
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Connectivity 题目描述 There are N cities. There are also K roads and L railways, extending between the cities. The i-th road bidirectionally connects the 阅读全文
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问题 I: T-shirt 题目描述 JSZKC is going to spend his vacation! His vacation has N days. Each day, he can choose a T-shirt to wear. Obviously, he doesn’t wan 阅读全文