VK Cup 2012 Round 3 (Unofficial Div. 2 Edition) 代码 VK Cup 2012 Round 3 (Unofficial Div. 2 Edition) A. Problem About Equation 每个杯子体积\[V=\frac{b+\sum{a_i}}{n}\] 判断是否有\(a_i > V\). B. File List 处理出'.'的位置. 第一个'.'和最后一个'.'特判字符长度是否合法. 连续的两点位置差\(d\in[2, 11]\)…
D. Distance in Tree time limit per test 3 seconds memory limit per test 512 megabytes input standard input output standard output A tree is a connected graph that doesn't contain any cycles. The distance between two vertices of a tree is the length (…
VK Cup 2015 - Round 1 (unofficial online mirror, Div. 1 only)E. The Art of Dealing with ATM Time Limit: 2 Sec Memory Limit: 256 MBSubmit: xxx Solved: 2xx 题目连接 http://codeforces.com/contest/529/problem/E Description ATMs of a well-known bank of a sm…
Codeforces Round #405 (rated, Div. 2, based on VK Cup 2017 Round 1) 全场题解 菜鸡只会A+B+C,呈上题解: A. Bear and Big Brother 题意:我也没看太清,就是给你两个10以内的数a,b.a每天乘以3,b每天乘以2,求多少天后a大于b. 思路:应该是有公式的,不过看到数据这么小直接暴力乘求解.官方题解貌似就是这样,数据小就是水题. const int N=1e3+10; int main() { int a…
题目链接: http://codeforces.com/problemset/problem/533/B B. Work Group time limit per test2 secondsmemory limit per test256 megabytes 问题描述 One Big Software Company has n employees numbered from 1 to n. The director is assigned number 1. Every employee of…
题目链接:http://codeforces.com/contest/158/problem/E E. Phone Talks time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Cool J has recently become a businessman Mr. Jackson, and he has to make a l…
C. Cd and pwd commands Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/problemset/problem/158/C Description Vasya is writing an operating system shell, and it should have commands for working with directories. To begin with, he dec…
C. String Manipulation 1.0 Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 codeforces.com/problemset/problem/91/B Description One popular website developed an unusual username editing procedure. One can change the username only by deleting some characte…
Cd and pwd commands time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Vasya is writing an operating system shell, and it should have commands for working with directories. To begin with, he…
A. Is it rated? time limit per test:2 seconds memory limit per test:256 megabytes input:standard input output:standard output Is it rated? Here it is. The Ultimate Question of Competitive Programming, Codeforces, and Everything. And you are here to a…
A. Vicious Keyboard 题意:给你一个字符串,里面只会包含VK,这两种字符,然后你可以改变一个字符,你要求VK这个字串出现的次数最多. 题解:数据范围很小,暴力枚举改变哪个字符,然后check就好. #include<bits/stdc++.h> using namespace std; int main(){ string s; cin>>s; int ans = 0; for(int i=0;i<s.size();i++){ if(s[i]=='V'){…
A. Is it rated? time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Is it rated? Here it is. The Ultimate Question of Competitive Programming, Codeforces, and Everything. And you are here to a…
Description Bear Limak prepares problems for a programming competition. Of course, it would be unprofessional to mention the sponsor name in the statement. Limak takes it seriously and he is going to change some words. To make it still possible to re…
A. Vicious Keyboard time limit per test:2 seconds memory limit per test:256 megabytes input:standard input output:standard output Tonio has a keyboard with only two letters, "V" and "K". One day, he has typed out a string s with only t…
FallDream打的AB都FFT了,只剩一个我打的C,没进前一百,之后看看马拉松复活赛有没机会呗. A. Voltage Keepsake 题目大意:n个东西,每个东西一开始有bi能源,每秒消耗ai能源,每秒可以给一个东西加p能源,秒可以为实数,问至多多少秒内所有东西能源一直为正.(n<=100,000) 思路:二分答案,随便check一下.不特判无解可能会炸精度. #include<cstdio> #include<algorithm> using namespace s…
B. Problems for Round 题目连接: http://www.codeforces.com/contest/673/problem/B Description There are n problems prepared for the next Codeforces round. They are arranged in ascending order by their difficulty, and no two problems have the same difficult…
A 模拟 B 发现对于每个连通块,只有为完全图才成立,然后就dfs C 构造 想了20分钟才会,一开始想偏了,以为要利用相邻NO YES的关系再枚举,其实不难.. 考虑对于顺序枚举每一个NO/YES,与前一个需要用的的字符串有k-1个交集,只多了一个string 于是只要保证k-1个string不同,只通过当前的string来影响答案, 若YES,开一个新的串: NO,则和第一个串一样,以此让这个相同串在下一次枚举中消失.. //怎么想到? 其实NO可能有多个相同名字,关系就很乱了,我们希望只有…
A. Vicious Keyboard time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Tonio has a keyboard with only two letters, "V" and "K". One day, he has typed out a string s with only t…
地址:http://codeforces.com/contest/807/problem/D 题目: D. Dynamic Problem Scoring time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vasya and Petya take part in a Codeforces round. The round las…
B. Problems for Round time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There are n problems prepared for the next Codeforces round. They are arranged in ascending order by their difficulty,…
Description A tree is an undirected connected graph without cycles. The distance between two vertices is the number of edges in a simple path between them. Limak is a little polar bear. He lives in a tree that consists of n vertices, numbered 1 throu…
连接在这里,->点击<- A. Bear and Game time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Bear Limak likes watching sports on TV. He is going to watch a game today. The game lasts 90 minutes and ther…
