Problem2901--Tree

2901: Tree

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Time Limit : 2.000 sec  Memory Limit : 256 MiB

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Description

time limit per test
2 seconds
memory limit per test
256 megabytes
input
standard input
output
standard output

Little X has a tree consisting of n nodes (they are numbered from 1 to n). Each edge of the tree has a positive length. Let's define the distance between two nodes v and u (we'll denote it d(v,u)) as the sum of the lengths of edges in the shortest path between v and u.

A permutation p is a sequence of n distinct integers p1,p2,...,pn (1≤pi≤n). Little X wants to find a permutation p such that sum is maximal possible. If there are multiple optimal permutations, he wants to find the lexicographically smallest one. Help him with the task!

Input

The first line contains an integer n(1≤n≤105).

Each of the next n-1 lines contains three space separated integers ui,vi,wi(1≤ui,vi≤n;1≤wi≤105), denoting an edge between nodes ui and vi with length equal to wi.

It is guaranteed that these edges form a tree.

Output

In the first line print the maximum possible value of the described sum. In the second line print n integers, representing the lexicographically smallest permutation.

Examples
Input
2
1 2 3
Output
6
2 1
Input
5
1 2 2
1 3 3
2 4 4
2 5 5
Output
32
2 1 4 5 3

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