1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
import java.util.Scanner;
public class Main 
{
    
    public static void main(String[] args) 
    {
        Scanner in = new Scanner(System.in);
        
        int numCity = in.nextInt();
        int numComm = in.nextInt();
        int[][] highway = new int[numCity][numCity];
        int[][] dist = new int[numCity][numCity];
        
        for(int i=0; i<numCity; i++)
        {
            for(int j=0; j<numCity; j++)
            {
                highway[i][j]=-1;
                dist[i][j] = 0;
            }
        }
        
        for(int i=1; i<numCity; i++)
        {
            addHighway(in.nextInt(),in.nextInt(),in.nextInt(), highway);
        }
        
        for(int i=0; i<numComm; i++)
        {
            String command = in.next();
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX