A. Appleman and Easy Task time limit per test  1 second memory limit per test  256 megabytes input  standard input output  standard output Toastman came up with a very easy task. He gives it to Appleman, but Appleman doesn't know how to solve it. Can…

A. Appleman and Easy Task time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Toastman came up with a very easy task. He gives it to Appleman, but Appleman doesn't know how to solve it. Can you…

A. Appleman and Easy Task time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Toastman came up with a very easy task. He gives it to Appleman, but Appleman doesn't know how to solve it. Can you…

原文链接https://www.cnblogs.com/zhouzhendong/p/CF461D.html 题解 首先我们可以发现如果确定了第一行,那么方案就唯一了. 然后,我们来看看一个点的值确定了会导致什么: 假设我们确定了红色点的值,那么所有包含橙色的格子xor起来就等于红色格子的值,绿色蓝色也是. 第一排就比较特殊了. 如果我们在对第一排奇偶分类之后,如果我们可以得到第一行的前缀xor之间的关系,那么我们就有希望解决这个问题. 再看一种情况: 类似地意思,我们会发现这个东西遇到墙会反射…

Problem D"Decoding Task" Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100002 Description In the near future any research and publications about cryptography are outlawed throughout the world on the grounds of national se…

An Easy Task Time Limit : 2000/1000ms (Java/Other)   Memory Limit : 65536/32768K (Java/Other) Total Submission(s) : 1   Accepted Submission(s) : 1 Font: Times New Roman | Verdana | Georgia Font Size: ← → Problem Description Ignatius was born in a lea…

题目链接:Codeforces 461B Appleman and Tree 题目大意:一棵树,以0节点为根节点,给定每一个节点的父亲节点,以及每一个点的颜色(0表示白色,1表示黑色),切断这棵树的k条边,使得树变成k+1个联通分量.保证每一个联通分量有且仅有1个黑色节点.问有多少种切割方法. 解题思路:树形dp,dp[i][0]和dp[i][1]分别表示子树一下的切割方法中,i节点所在联通块不存在黑节点和已经存在一个黑节点的方案数. #include <cstdio> #include &l…

An Easy Task Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 4088 Accepted Submission(s): 2327   Problem Description Ignatius was born in a leap year, so he want to know when he could hold his bir…

E - Easy Task Description Calculating the derivation of a polynomial is an easy task. Given a function f(x) , we use (f(x))' to denote its derivation. We use x^n to denote xn. To calculate the derivation of a polynomial, you should know 3 rules:(1) (…

B. An Easy Task Time Limit: 1000ms Case Time Limit: 1000ms Memory Limit: 65536KB 64-bit integer IO format: %lld      Java class name: Main Submit Status PID: 35999 Font Size:  +   - You are given an easy task by your supervisor -- to find the best va…