Codeforces #261 D D. Pashmak and Parmida's problem time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Parmida is a clever girl and she wants to participate in Olympiads this year. Of course s…

题目地址:http://codeforces.com/contest/459/problem/C C. Pashmak and Buses time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Recently Pashmak has been employed in a transportation company. The com…

      2014_8_15 CodeForces 261 DIV2 A. Pashmak and Garden 简单题   B. Pashmak and Flowers    简单题   C. Pashmak and Buses     好题!k进制的应用   D. Pashmak and Parmida's problem 简单题! 统计+树状数组    E. Pashmak and Graph 简单题!排序+DP  2014-08-17 BestCoder Round #5 A. Poo…

Codeforces Round #261 (Div. 2)[ABCDE] ACM 题目地址:Codeforces Round #261 (Div. 2) A - Pashmak and Garden 题意:  一个正方形,它的边平行于坐标轴,给出这个正方形的两个点,求出另外两个点. 分析:  推断下是否平行X轴或平行Y轴,各种if. 代码: /* * Author: illuz <iilluzen[at]gmail.com> * File: A.cpp * Create Date: 2014…

链接:http://codeforces.com/contest/459/problem/B B. Pashmak and Flowers time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Pashmak decided to give Parmida a pair of flowers from the garden. Ther…

http://codeforces.com/contest/459/problem/E 不明确的是我的代码为啥AC不了,我的是记录we[i]以i为结尾的点的最大权值得边,然后wa在第35  36组数据 然后參考答案了,然后----网上一份题解 大意: 给出一个带权有向图,求经过的边权绝对上升的最长路径(可能是非简单路径,就可以能经过一个点多次)所包括的边数. 题解: 对边按权值排序后,从小到大搞. 设q[x]为已经搞过的边组成的以x点为终点的最长路径包括的边数. 设当前边e[i]为从u到v的边,…

题目链接:http://codeforces.com/contest/459/problem/D D. Pashmak and Parmida's problem time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Parmida is a clever girl and she wants to participate in O…

题目连接:http://codeforces.com/contest/459/problem/E 题目大意:给定一张有向图,无自环无重边,每条边有一个边权,求最长严格上升路径长度.(1≤n,m≤3 *10^5) 初见此题觉得以边为点,以点为边,重建一张图,小边权向(通过点)相邻的大边权连边,然后得到一张DAG,跑最长DAG路即可.然而仔细一想,这样新图边数上限可以达到m^2.被否决. 后来想到边权有序化思想(并不知道怎么想到的…可能受kruskal思想影响),按边从大到小排序,然后一条边一条边加…

题目链接:http://codeforces.com/problemset/problem/459/B 题意: 给出n支花,每支花都有一个漂亮值.挑选最大和最小漂亮值得两支花,问他们的差值为多少,并且有多少种选法(无先后顺序). 现场做时,想到的是:用multimap记录每个漂亮值出现的次数,并不断更新最大最小值. 这个方法很笨,而且multimap的val值是多余的. 需要注意特殊情况:max==min 代码如下: #include<iostream>//A - Pashmak and Fl…

题目链接:http://codeforces.com/problemset/problem/459/A A. Pashmak and Garden time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Pashmak has fallen in love with an attractive girl called Parmida s…