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问题 J: Unhappy Hacking I 题目描述 Sig has built his own keyboard. Designed for ultimate simplicity, this keyboard only has 3 keys on it: the 0 key, the 1 k 阅读全文
摘要：
问题 D: Iroha's Obsession 题目描述 Iroha is very particular about numbers. There are K digits that she dislikes: D1,D2,…,DK. She is shopping, and now paying 阅读全文