Davenny：~我今天该吃点什么捏~

You are given a tree (an acyclic undirected connected graph) with N nodes, and edges numbered 1, 2, 3…N-1.We will ask you to perfrom some instructions of the following form:CHANGE i ti : change the cos

Mad scientist Mike has constructed a rooted tree, which consists of n vertices. Each vertex is a reservoir which can be either empty or filled with water.The vertices of the tree are numbered from 1 to

给定一棵有n个节点的无根树和m个操作，操作有2类： 1、将节点a到节点b路径上所有点都染成颜色c； 2、询问节点a到节点b路径上的颜色段数量（连续相同颜色被认为是同一段），如“ 112221 ” 由3段组成：“ 11 ” 、“ 222 ” 和“ 1 ” 。 请你写一个程序依次完成这m个操作。 Input 第一行包含2个整数n和m，分别表示节点数和操作数； 第二行包含n个正整数表示n个节点

The Subtle Balloons Company (SBC) is the main balloon provider for programming contests; it has huge factories and warehouses, as well as an extensive truck fleet to ensure the contestants’ happiness.