【NWERC2015】【BZOJ4430】Guessing Camels赌骆驼

最新推荐文章于 2020-07-04 12:38:30 发布

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最新推荐文章于 2020-07-04 12:38:30 发布 · 2.5k 阅读

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#BIT

博客讲述了Jaap, Jan, 和 Thijs在沙漠旅行后参加的骆驼赛跑赌局。他们想知道有多少对骆驼在他们的赌局中被三人一致预测为相同顺序。输入包含骆驼数量和每个人的赌局顺序，输出是所有赌局中相同顺序的骆驼对数。问题可以通过BIT（Binary Indexed Tree）解决。" 115820721,8291187,Impala服务API：DDL操作详解,"['大数据', '数据库管理', '数据操作', 'Impala DDL', 'HDFS']

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Jaap, Jan, and Thijs are on a trip to the desert after having attended the ACM ICPC World Finals 2015 in Morocco. The trip included a camel ride, and after returning from the ride, their guide invited them to a big camel race in the evening. The camels they rode will also participate and it is customary to bet on the results of the race.
One of the most interesting bets involves guessing the complete order in which the camels will finish the race. This bet offers the biggest return on your money, since it is also the one that is the hardest to get right.
Jaap, Jan, and Thijs have already placed their bets, but the race will not start until an hour from now, so they are getting bored. They started wondering how many pairs of camels they have put in the same order. If camel cc is before camel d on Jaap’s, Jan’s and Thijs’ bet, it means that all three of them put c and d in the same order. Can you help them to calculate the number of pairs of camels for wh