CF1057A.Bmail Computer Network
入门
通过率:0%
时间限制:4.00s
内存限制:256MB
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题目描述
Once upon a time there was only one router in the well-known company Bmail. Years went by and over time new routers were purchased. Every time they bought a new router, they connected it to one of the routers bought before it. You are given the values pi — the index of the router to which the i-th router was connected after being purchased (pi<i).
There are n routers in Boogle in total now. Print the sequence of routers on the path from the first to the n-th router.
从前,在著名的公司 Bmail 中只有一台路由器。多年过去,随着时间推移,他们陆续购置了新的路由器。每次购买一台新路由器时,都会将其连接到之前已购入的某一台路由器上。现给出数组 pi —— 表示第 i 台路由器在购入后所连接的路由器编号(满足 pi<i)。
目前 Boogle 公司共有 n 台路由器。请输出从第 1 台路由器到第 n 台路由器的路径上的路由器序列。
输入格式
The first line contains integer number n (2≤n≤200000) — the number of the routers. The following line contains n−1 integers p2,p3,…,pn (1≤pi<i), where pi is equal to index of the router to which the i-th was connected after purchase.
第一行包含一个整数 n(2≤n≤200000)—— 路由器的数量。
接下来的一行包含 n−1 个整数 p2,p3,…,pn(1≤pi<i),其中 pi 表示第 i 个路由器在购买后所连接的路由器的编号。
输出格式
Print the path from the 1-st to the n-th router. It starts with 1 and ends with n. All the elements in the path should be distinct.
输出从第 1 个路由器到第 n 个路由器的路径。该路径以 1 开始,以 n 结束,且路径中所有元素互不相同。
输入输出样例
输入#1
8 1 1 2 2 3 2 5
输出#1
1 2 5 8
输入#2
6 1 2 3 4 5
输出#2
1 2 3 4 5 6
输入#3
7 1 1 2 3 4 3
输出#3
1 3 7
输入解题思路,AI测评打分。不知道怎么写?