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题目大意： Description Bessie is stranded on a deserted arctic island and wants to determine all the paths she might take to return to her pasture. She has 阅读全文
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题目大意： Description There is a rectangular room, covered with square tiles. Each tile is colored either red or black. A man is standing on a black tile. 阅读全文
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题目大意： 大年初一，Alice带上拜年礼物去给N-1位亲朋好友长辈拜年，亲友真多啊，是个大家族。由于Alice才2岁，力气不大，每次只能拿一份礼物，拜完年之后，要回家取第二份礼物，然后去下一家拜年（无语了）。为了表示对亲朋长辈的尊敬，Alice每次都从家步行去到对方家里，拜完年由爸爸骑自行车带回家 阅读全文