P3662 [USACO17FEB]Why Did the Cow Cross the Road II S 题目描述 The long road through Farmer John's farm has NN crosswalks across it, conveniently numbered 1 \ldots N1…N (1 \leq N \leq 100,0001≤N≤100,000). To allow cows to cross at these crosswalks, FJ in…
P3663 [USACO17FEB]Why Did the Cow Cross the Road III S 题目描述 Why did the cow cross the road? Well, one reason is that Farmer John's farm simply has a lot of roads, making it impossible for his cows to travel around without crossing many of them. 为什么牛过…
[USACO17FEB]Why Did the Cow Cross the Road III P 考虑我们对每种颜色记录这样一个信息 \((x,y,z)\),即左边出现的位置,右边出现的位置,该颜色. 于是统计的是\(x < x_2,y > y_2,|z - z2| > k\)的数对数量. 因为\(CDQ\)分治的过程是,第一维事先排序,第二维递归进行,第三维用数据结构统计,所以 上述这个数量是很好处理的. // Problem: P3658 [USACO17FEB]Why Did th…
//神题目(题目一开始就理解错了)... 题目描述 Why did the cow cross the road? Well, one reason is that Farmer John's farm simply has a lot of roads, making it impossible for his cows to travel around without crossing many of them. 奶牛们为什么要穿马路?一个原因只是因为FJ的牧场的路实在是太多了,使得奶牛们每…
题目描述 Why did the cow cross the road? Well, one reason is that Farmer John's farm simply has a lot of roads, making it impossible for his cows to travel around without crossing many of them. 奶牛们为什么要穿马路?一个原因只是因为FJ的牧场的路实在是太多了,使得奶牛们每天不得不穿梭在许许多多的马路中央 FJ's…
题目描述 Why did the cow cross the road? Well, one reason is that Farmer John's farm simply has a lot of roads, making it impossible for his cows to travel around without crossing many of them. 为什么牛过马路? 其中一个简单的原因就是农民约翰的农场有很多道路,使得他的母牛不得不穿越许多道路. FJ's farm…
题目描述 Farmer John's cows are trying to learn to cross the road effectively. Remembering the old "why did the chicken cross the road?" joke, they figure the chickens must be experts on crossing the road, and go off in search of chickens to help th…
题目背景 给定长度为2N的序列,1~N各处现过2次,i第一次出现位置记为ai,第二次记为bi,求满足ai<aj<bi<bj的对数 题目描述 The layout of Farmer John's farm is quite peculiar, with a large circular road running around the perimeter of the main field on which his cows graze during the day. Every morn…
题目描述 The long road through Farmer John's farm has crosswalks across it, conveniently numbered (). To allow cows to cross at these crosswalks, FJ installs electric crossing signals, which light up with a green cow icon when it is ok for the cow to c…
