A. I_love_%username% time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vasya adores sport programming. He can't write programs but he loves to watch the contests' progress. Vasya even has a…

题目链接:http://www.codeforces.com/problemset/problem/155/A题意:找到当前最大值或者最小值出现的次数.“当前”的意思差不多是a[i]大于所有a[j](j小于i)或者大于所有a[j].C++代码: #include <iostream> using namespace std; ]; int main() { cin >> n; ; i < n; i++) cin >> a[i]; ], High = a[], cn…

题目传送门 /* 贪心:按照能选的个数和点数降序排序,当条件不符合就break,水题啊! */ #include <cstdio> #include <algorithm> #include <cstring> #include <cmath> using namespace std; ; const int INF = 0x3f3f3f3f; struct Card { int a, b; }card[MAXN]; bool cmp(Card x, Car…

题目链接: http://codeforces.com/problemset/problem/155/E E. Double Profiles time limit per test 3 secondsmemory limit per test 256 megabytes 问题描述 You have been offered a job in a company developing a large social network. Your first task is connected wit…

A - Hometask 题意:给你一个字符串,然后再给你k个禁止挨在一起的字符串,问你最少删除多少个字符串,使得不会有禁忌的字符串对挨在一起.题目保证每个字符最多出现在一个禁忌中. 题解:由于每个字符只会出现在一个禁忌里面,那么就说明每个询问是独立的.对于每个询问,我们贪心的去处理就好了,就连续的禁忌字符串,我们删除少的那个就好了. #include<bits/stdc++.h> using namespace std; string s,s2; int ans,a,b,m,c,d; int…

Codeforces Round #372 (Div. 2) C. Plus and Square Root 题意 一个游戏中,有一个数字\(x\),当前游戏等级为\(k\),有两种操作: '+'按钮:使得\(x=x+k\) '√'按钮:使得\(x=\sqrt{x}\),此时\(x\)必须是平方数,游戏等级加1,即\(k=k+1\),且\(\sqrt{x}\)是\(k+1\)的倍数. 游戏开始时,\(x=2,k=1\),输出\(n(n \le 10^5)\)个数,表示每个等级对应的\(\frac…

Codeforces Round #418 (Div. 2) D. An overnight dance in discotheque 题意: 给\(n(n <= 1000)\)个圆,圆与圆之间不存在相交关系,只存在包含与不包含关系,现在问你把这一堆圆分成两组,求每组圆的异或并和的最大值. 思路:最简单的做法是贪心的做法,算出每个圆被包含的次数,为偶数则贡献为正,奇数为贡献为负. 现在主要学习一下树形dp的做法 由于圆不存在相交的情况,所以可以把所有的圆建成树,即把每棵树上的点分成两组,分别建成…

 cf之路,1,Codeforces Round #345 (Div. 2) ps:昨天第一次参加cf比赛,比赛之前为了熟悉下cf比赛题目的难度.所以做了round#345连试试水的深浅.....       其实这个应该是昨天就写完的,不过没时间了,就留到了今天.. 地址:http://codeforces.com/contest/651/problem/A A. Joysticks time limit per test 1 second memory limit per test 256…

Codeforces Round #262 (Div. 2) 1003 C. Present time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Little beaver is a beginner programmer, so informatics is his favorite subject. Soon his info…

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…