Question

WRITE A PROGRAM IN C/C++ FOR THE QUESTION, INCLUDE COMMENTS, CHECK IF SAMPLE INPUT AND OUTPUT...

WRITE A PROGRAM IN C/C++ FOR THE QUESTION, INCLUDE COMMENTS, CHECK IF SAMPLE INPUT AND OUTPUT MATCH WITH SAME FORMAT :)
Kruskal minimum spanning tree algorithm
Description 1013

Investigation province town traffic , urban roads to give existing tables , the table lists the price it takes to connect the two towns . Government "smooth project ," the goal is to make the province between any two towns can implement traffic ( but not necessarily directly connected to the road , as long as the road up to each other indirectly through ) . Q. How much the cost of a minimum cost to complete the project ?

Input

The input contains multiple sets of data , for each set of test data
The first line contains two positive integers N and M (0 is followed by M rows road information . Each row contains three integers A, B, X (0 <A, B
Output

For each test , complete a minimum output of the cost of the project will take .

Sample Input

33
123
131
232

Sample Output

3
0 0
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