题目链接:http://codeforces.com/contest/1194                                            A.Remove a Progression time limit per test:2 seconds memory limit per test:256 megabytes input:standard input output:standard output You have a list of numbers from 11…

传送门 https://codeforces.com/contest/1496/problem/B 题目 Example input 5 4 1 0 1 3 4 3 1 0 1 4 3 0 0 1 4 3 2 0 1 2 3 2 1 2 3 output 4 4 3 5 3 Note In the first test case, S={0,1,3,4}S={0,1,3,4}, a=mex(S)=2a=mex⁡(S)=2, b=max(S)=4b=max(S)=4, ⌈a+b2⌉=3⌈a+b2⌉…

After I read the solution to the problem, I found that my solution was simply unsightly. Solved 4 out of 7, and my solution to C was hacked, because of my incorrect order when i meet in the middle. I wasted about 20 mins on problem A due to the incom…

You have two variables a and b. Consider the following sequence of actions performed with these variables: If a = 0 or b = 0, end the process. Otherwise, go to step 2; If a ≥ 2·b, then set the value of a to a - 2·b, and repeat step 1. Otherwise, go t…

CF1501 Div2 题解 CF1501A 这道题其实是一道英语阅读题,然后样例解释又不清晰,所以我看了好久,首先它告诉了你每个站点的预期到达时间 \(a_i\) ,以及每个站点的预期出发时间 \(b_i\) . 那么对每个站点来说,从上一个站点的预期出发时间 \(b_{i-1}\) 到当前站点的预期到达时间 \(a_{i}\) ,那么中间差的时间就是你从上一个站点到达这个站点的时间,计算出 \(go_i\) \(=\) \(a_i - b_{i-1}\) 就计算出第 \(i-1\) 个站点到…

Codeforces Round #590 (Div. 3) Editorial 题目链接 官方题解 不要因为走得太远,就忘记为什么出发! Problem A 题目大意:商店有n件商品,每件商品有不同的价格,找出一个最小的可能值price,使得price * n >= sum,sum指的是原来商品价格的总和. 知识点:模拟 思路:求出sum/n向上取整即可,有两种方法.一是使用ceil()函数,但注意ceil()返回的是向上取整后的浮点数,所以要进行强制类型转换:二是直接向下取整,然后用if语句…

Codeforces Round #747 (Div. 2) A. Consecutive Sum Riddle 思路分析: 一开始想起了那个公式\(l + (l + 1) + - + (r − 1) + r = (l + r)(r - l + 1) / 2\). 然后一看令\(l + r = 1\)最合适,那么就有\(l = r - 1\),一代入就得到\(r = n, l = -n + 1\). 没想通为什么没有一眼看出来. 代码 #include <bits/stdc++.h> #def…

Vasiliy's Multiset 题目链接: http://codeforces.com/contest/706/problem/D Description Author has gone out of the stories about Vasiliy, so here is just a formal task description. You are given q queries and a multiset A, initially containing only integer…

Hard problem 题目链接: http://codeforces.com/contest/706/problem/C Description Vasiliy is fond of solving different tasks. Today he found one he wasn't able to solve himself, so he asks you to help. Vasiliy is given n strings consisting of lowercase Engl…

Interesting drink 题目链接: http://codeforces.com/contest/706/problem/B Description Vasiliy likes to rest after a hard work, so you may often meet him in some bar nearby. As all programmers do, he loves the famous drink "Beecola", which can be bough…