摘要:
题目描述 Farmer John has decided to assemble a panoramic photo of a lineup of his N cows (1 <= N <= 200,000), which, as always, are conveniently numbered 阅读全文
摘要:
题目描述 给定一张地势图,所有的点都被水淹没,现在有一些关键点,要求放最少的水泵使所有关键点的水都被抽干 输入输出格式 输入格式: In the first line of the standard input there are two integers and , separated by a 阅读全文