ACM 关于 树和子数的概念B.Tree Dear contestant,I bet you must know what a tree represent.In data structure,we learn a tree is a graph in which every two nodes have and only have one path.Here comes an easy problem,given a tree with nodes have

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ACM关于树和子数的概念B.TreeDearcontestant,Ibetyoumustknowwhatatreerepresent.Indatastructure,welearnatreeisagr

ACM 关于 树和子数的概念B.Tree Dear contestant,I bet you must know what a tree represent.In data structure,we learn a tree is a graph in which every two nodes have and only have one path.Here comes an easy problem,given a tree with nodes have
ACM 关于 树和子数的概念
B.Tree
Dear contestant,I bet you must know what a tree represent.In data structure,we learn
a tree is a graph in which every two nodes have and only have one path.
Here comes an easy problem,given a tree with nodes have its weight,the weight of a
tree is the sum of the weight of all nodes on it.Now we have a chance to divide the
tree into two subtrees,and we want to know the minimum difference between the two
subtrees‟weight.
Input
The first line contains a single integer T,indicating the number of test cases.
Each test case begins with one integer N (2

ACM 关于 树和子数的概念B.Tree Dear contestant,I bet you must know what a tree represent.In data structure,we learn a tree is a graph in which every two nodes have and only have one path.Here comes an easy problem,given a tree with nodes have
树是图论里的概念,在数据结构或离散数学的书籍上都有介绍,LZ所说的树是树的特例（2叉树或n叉树）.
树的定义：设G=(P,L)是图,如果G是连通的,并且无回路,则称G为树.
无回路的图（可能不连通）也称为森林.
eage of tree 是指树的一条边.

ACM 关于 树和子数的概念B.Tree Dear contestant,I bet you must know what a tree represent.In data structure,we learn a tree is a graph in which every two nodes have and only have one path.Here comes an easy problem,given a tree with nodes have 关于高数的极限概念问题 关于小学数学“数”的概念 lemon tree 这首歌的意义关于lemon tree 这首歌的故事 和意义 小学读数和写数的概念 读数和写数的概念 小学数学总复习“数的概念小学关于“数的所有概念 下列关于钠原子和钠离子说法正确的是?A他们的核电子数相同 B他们的性质完全相同 C那原子质量比那下列关于钠原子和钠离子说法正确的是?A他们的核电子数相同B他们的性质完全相同C那原子 关于绝对值的概念和计算等. 物理关于运动和力的概念 关于真菌和细菌的概念! 关于正反比例的定义和概念 关于生态系统和生物圈的概念 关于勾股定理的概念和公式 关于摩擦力的概念和定律 关于集群的概念和理论. 钛原子的和外电子数 关于数系的扩充与复数的概念