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下面容许我偷个懒,洛谷上写过的blog我就不来再抄一遍了 那么我先讲一讲今天晚上的第一道题吧(话说今天晚上好黑教室里还就我一个银_ (:з」∠)_)! 题目如下: [POI2008]BLO-Blockade 题目描述 There are exactly nn towns in Byteotia. S 阅读全文
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题目描述 in English: Farmer John and his cows are planning to leave town for a long vacation, and so FJ wants to temporarily close down his farm to save m 阅读全文