Content 有 \(t\) 组询问,每组询问给定两个整数 \(l,r\),问是否存在一个 \(a\),使得 \(\forall x\in[l,r]\),都有 \(x\mod a\geqslant\dfrac{a}{2}\). 数据范围:\(1\leqslant t\leqslant 1000,1\leqslant l,r\leqslant 10^9\). Solution 我们可以让 \(a=2x\),这样就很容易使得 \(x\mod a\geqslant \dfrac{a}{2}\),因此…

比赛链接:https://codeforces.com/contest/1437 A. Marketing Scheme 题解 令 \(l = \frac{a}{2}\),那么如果 \(r < a\),每个顾客都会买更多猫粮. 代码 #include <bits/stdc++.h> using namespace std; int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int t; cin >> t;…

补了一场Edu round. A : Marketing Scheme 水题 #include <cstdio> #include <algorithm> typedef long long ll; int T,l,r; template <typename T> inline void read(T &x){ x = 0; char ch = getchar(); int f = 1; for(;ch < '0' || ch > '9'; ch =…

http://poj.org/problem?id=2060 Taxi Cab Scheme Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 5459   Accepted: 2286 Description Running a taxi station is not all that simple. Apart from the obvious demand for a centralised coordination…

Taxi Cab Scheme 时间限制: 1 Sec  内存限制: 64 MB 题目描述 Running a taxi station is not all that simple. Apart from the obvious demand for a centralised coordination of the cabs in order to pick up the customers calling to get a cab as soon as possible,there is…

前言 由于工作原因,需要用到今日头条的Marketing API做一些广告投放的定制化开发.然后看现在网上也没多少关于头条Marketing API的文章,于是便就有了该篇文章. 头条Marketing API主页地址:https://ad.toutiao.com/openapi/index.html. 头条Marketing API开发文档:https://ad.toutiao.com/openapi/doc/index.html 交互图 典型的OAuth2.0授权流程: 使用步骤 1. 首先…

E. Scheme   To learn as soon as possible the latest news about their favourite fundamentally new operating system, BolgenOS community from Nizhni Tagil decided to develop a scheme. According to this scheme a community member, who is the first to lear…

题意翻译 题目描述 每年,在威斯康星州,奶牛们都会穿上衣服,收集农夫约翰在N(1<=N<=100,000)个牛棚隔间中留下的糖果,以此来庆祝美国秋天的万圣节. 由于牛棚不太大,FJ通过指定奶牛必须遵循的穿越路线来确保奶牛的乐趣.为了实现这个让奶牛在牛棚里来回穿梭的方案,FJ在第i号隔间上张贴了一个“下一个隔间”Next_i(1<=Next_i<=N),告诉奶牛要去的下一个隔间:这样,为了收集它们的糖果,奶牛就会在牛棚里来回穿梭了. FJ命令奶牛i应该从i号隔间开始收集糖果.如果一只…

Rhyme scheme Problem Describe A rhyme scheme is the pattern of rhymes at the end of each line of a poem or song. It is usually referred to by using letters to indicate which lines rhyme; lines designated with the same letter all rhyme with each other…

[题解]CF742E (二分图+构造) 自闭了CodeForces - 742E 给定的条件就是一个二分图的模型,但是有一些不同.不同就不同在可以出现相邻两个点颜色相同的情况. 构造常用方法之一是按奇偶分类,就是尽管不同奇偶性的块之间会产生影响,但是我们先不管这些限制. 这道题里,假若奇偶块之内都能满足题目的限制,那么奇偶块之间也满足限制了.因为限制是不能存在三个联系相等,然而我们已经保证块内每两个不相等. 男女朋友连边. \(2i\)和\(2i-1\)连边. 然后跑二分图染色,考虑是否存在无解…