GTW likes tree
Time Limit: 7000/3500 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others)
Total Submission(s): 191 Accepted Submission(s): 38
Problem Description
GTW has a tree of n nodes, in which m nodes are special nodes. The value of node i is vi.
Dis(x,y) is defined as
Problem Description Byteasar has a tree T with n vertices conveniently labeled with 1,2,...,n. Each vertex of the tree has an integer value vi.The value of a non-empty tree T is equal to v1⊕v2⊕...⊕vn, where ⊕ denotes bitwise-xor.Now for every in
Problem Description Given a number N, you are asked to count the number of integers between A and B inclusive which are relatively prime to N.Two integers are said to be co-prime or relatively prime if they have no common positive divisors other than 1 or, equivalently, if their greatest common divi
Problem Description Perhaps the sea‘s definition of a shell is the pearl. However, in my view, a shell necklace with n beautiful shells contains the most sincere feeling for my best lover Arrietty, but even that is not enough.Suppose the shell necklace is a sequence of shells (not a chain end to end
Problem Description You may not know this but it's a fact that Xinghai Square is Asia's largest city square. It is located in Dalian and, of course, a landmark of the city. It's an ideal place for outing any time of the year. And now: There are N children from a near
Problem Description Professor Zhang has an undirected graph G with n vertices and m edges. Each vertex is attached with a weight wi. Let Gi be the graph after deleting the i-th vertex from graph G. Professor Zhang wants to find the weight of&nbs
【题目描述】小苗去市场上买了一捆小葱苗，她突然一时兴起，于是她在每颗小葱苗上写上一个数字，然后把小葱叫过来玩游戏。 每个时刻她会给小葱一颗小葱苗或者是从小葱手里拿走一颗小葱苗，并且让小葱从自己手中的小葱苗里选出一些小葱苗使得选出的小葱苗上的数字的异或和最大。 这种小问题对于小葱来说当然不在话下，但是他的身边没有电脑，于是他打电话给同为Oi选手的你，你能帮帮他吗？ 你只需要输出最大的异或和即可，若小葱手中没有小葱苗则输出0" data-mce-tabindex="0">00。 【输入】第一行一个正整数n" data-mce-tabindex="0">nn表示总时间；第二行n" dat
GRE WordsTime Limit: 30000/15000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 5466 Accepted Submission(s): 678 Problem Description Recently George is preparing for the Graduate Record Examinations (GRE for short). Obviou
Problem DescriptionThere is a skyscraping tree standing on the playground of Nanjing University of Science and Technology. On each branch of the tree is an integer (The tree can be treated as a connected graph with N vertices, while each branch can be treated as a vertex). Today the students under t
Problem Description Alice and Bob want to play an interesting game on a tree.Given is a tree on N vertices, The vertices are numbered from 1 to N. vertex 1 represents the root. There are N-1 edges. Players alternate in making moves, Alice moves first. A move consists of two steps. In the firs
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