滁生

C. Foe Pairs Your task is to count the number of different intervals (x, y) (1 ≤ x ≤ y ≤ n) that do

Alice and Bob are playing a game on a graph. They have an undirected graph without self-loops and mu

题目描述 幼儿园里有 n 个小朋友打算通过投票来决定睡不睡午觉。 对他们来说，这个问题并不是很重要，于是他们决定发扬谦让精神。 虽然每个人都有自己的主见，但是为了照顾一下自己朋友的想法，他们也可以投和

This is the easy version of the problem. The only difference is that in this version k≤min(n,3)�≤min

adly, the problem setter couldn't think of an interesting story, thus he just asks you to solve the

Time Limit: 2 sec / Memory Limit: 1024 MB Score : 500500 points Problem Statement You are given a po

You're given a multiset of non-negative integers {a1,a2,…,an}{�1,�2,…,��}. In one step you take two

A sequence is almost-increasing if it does not con

这里有一条美丽的小巷，在一个购物中心的前面有树木。不幸的是，为了给停车场腾出空间，它不得不离开。 巷子里的树都长在一条线上。有n个树点，指数00是商场，指数n+1n+1是道路，指数从11到n