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Description For the daily milking, Farmer John's N cows (1 ≤ N ≤ 50,000) always line up in the same order. One day Farmer John decides to organize a g 阅读全文
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采 油区域 Siruseri政府决定将石油资源丰富的Navalur省的土地拍卖给私人承包商以建立油井。被拍卖的整块土地为一个矩形区域,被划分为M×N个小块。 Siruseri地质调查局有关于Navalur土地石油储量的估测数据。这些数据表示为M×N个非负整数,即对每一小块土地石油储量的估计值。 为了 阅读全文
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Buy Tickets Description Railway tickets were difficult to buy around the Lunar New Year in China, so we must get up early and join a long queue… The L 阅读全文
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这题算是一道图论好题了,先用Kosaraju算法求强连通分量,然后缩点跑最长路,这里必须用Spfa,不能用dijkstra算法。 阅读全文