QTREE6 - Query on a tree VI

题面翻译

题目描述

给你一棵 $n$ 个点的树，编号 $1\sim n$。每个点可以是黑色，可以是白色。初始时所有点都是黑色。下面有两种操作：

• 0 u：询问有多少个节点 $v$ 满足路径 $u$ 到 $v$ 上所有节点（包括 $u$）都拥有相同的颜色。
• 1 u：翻转 $u$ 的颜色。

输入格式

第一行一个整数 $n$。

接下来 $n-1$ 行，每行两个整数表示一条边。

接下来一行一个整数 $m$ 表示操作次数。

接下来 $m$ 行，每行两个整数分别表示操作类型和被操作节点。

输出格式

对每个询问操作输出相应的结果。

题目描述

You are given a tree (an acyclic undirected connected graph) with $n$ nodes. The tree nodes are numbered from $1$ to $n$. Each node has a color, white or black. All the nodes are black initially. We will ask you to perform some instructions of the following form:

• 0 u: ask for how many nodes are connected to $u$, two nodes are connected if all the node on the path from $u$ to $v$ (inclusive $u$ and $v$) have the same color.
• 1 u: toggle the color of $u$ (that is, from black to white, or from white to black).

输入格式

The first line contains a number $n$ that denotes the number of nodes in the tree ($n-1$ lines), there will be two numbers $(u, v)$ that describes an edge of the tree ($1\leq u, v\leq n$). The next line contains a number $m$ denoting number of operations we are going to process ($m$ lines) describe an operation $(t, u)$ as we mentioned above ($0\leq t\leq 1, 1 \leq u\leq n$).

输出格式

For each query operation, output the corresponding result.

样例 #1

样例输入 #1

5
1 2
1 3
1 4
1 5
3
0 1
1 1
0 1

样例输出 #1

5
1

提示

$1\leq n,m\leq 10^5$。