地址:http://codeforces.com/contest/764/problem/C 题目: C. Timofey and a tree time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Each New Year Timofey and his friends cut down a tree of n vertices…

标题写的树形DP是瞎扯的. 先把1看作根. 预处理出f[i]表示以i为根的子树是什么颜色,如果是杂色的话,就是0. 然后从根节点开始转移,转移到某个子节点时,如果其子节点都是纯色,并且它上面的那一坨结点也是纯色,就输出解. 否则如果其上面的一坨是纯色,并且其子节点有且只有一个杂色的时候,就递归处理该子节点. #include<cstdio> #include<cstdlib> using namespace std; #define N 100050 int v[N<<…

地址:http://codeforces.com/contest/764/problem/D 题目: D. Timofey and rectangles time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output One of Timofey's birthday presents is a colourbook in a shape o…

地址:http://codeforces.com/contest/764/problem/B 题目: B. Timofey and cubes time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Young Timofey has a birthday today! He got kit of n cubes as a birthd…

D题: 题目思路:给你n个不想交的矩形并别边长为奇数(很有用)问你可以可以只用四种颜色给n个矩形染色使得相接触的 矩形的颜色不相同,我们首先考虑可不可能,我们分析下最多有几个矩形互相接触,两个时可以都互相接触 三个时也可以互相接触,而四个时怎么摆我们都不能让他们相互都接触,所以我们最多可以用三种不同颜色 的矩形去接触另一个矩形,因此我们就一定可以用四种颜色来染色,然后我们来考虑怎么染色,因为不存在相 交的情况,所以就拿左下角来分析,首先我们来分析下, 1,两个矩形要上下接触时:我们考虑纵坐标,因…

2.2.2017 9:35~11:35 A - Taymyr is calling you 直接模拟 #include <iostream> #include <cstdio> #include <algorithm> #include <cstring> #include <cmath> using namespace std; typedef long long ll; ; inline int read(){ ,f=; ; c=getcha…

今天自己模拟了一套题,只写出两道来,第三道时间到了过了几分钟才写出来,啊,太菜了. A. Taymyr is calling you 水题,问你在z范围内  两个序列  n,2*n,3*n......  和 m,2*m,3*m.....有多少个是一样的. #include<bits/stdc++.h> using namespace std; int n,m,z; int main() { cin>>n>>m>>z; int gcd=__gcd(n,m);…

A. Taymyr is calling you time limit per test:1 second memory limit per test:256 megabytes input:standard input output:standard output Comrade Dujikov is busy choosing artists for Timofey's birthday and is recieving calls from Taymyr from Ilia-alpinis…

Description One of Timofey's birthday presents is a colourbook in a shape of an infinite plane. On the plane n rectangles with sides parallel to coordinate axes are situated. All sides of the rectangles have odd length. Rectangles cannot intersect, b…

Description Young Timofey has a birthday today! He got kit of n cubes as a birthday present from his parents. Every cube has a number ai, which is written on it. Timofey put all the cubes in a row and went to unpack other presents. In this time, Timo…