1 #include<stdio.h>
 2 #include<string.h>
 3 #include<iostream>
 4 using namespace std;
 5 #define ll __int64
 6 struct node
 7 {
 8     int from;
 9     int to;
10     int w;
11     int next;
12 }e[1500000];
13 int n;
14 int root;
15 int minn;
16 int cont;
17 ll output;
18 int vis[150000];
19 int d[150000];
20 int head[150000];
21 void add(int from,int to,int w)
22 {
23     e[cont].to=to;
24     e[cont].w=w;
25     e[cont].next=head[from];
26     head[from]=cont++;
27 }
28 int Dfs(int u,int from)
29 {
30     if(d[u]==0)
31     {
32         d[u]=1;
33         for(int i=head[u];i!=-1;i=e[i].next)
34         {
35             int v=e[i].to;
36             if(v==from)continue;
37             d[u]+=Dfs(v,u);
38         }
39         int tmpmaxn=0;
40         for(int i=head[u];i!=-1;i=e[i].next)
41         {
42             int v=e[i].to;
43             tmpmaxn=max(d[v],tmpmaxn);
44         }
45         tmpmaxn=max(n-d[u],tmpmaxn);
46         if(tmpmaxn<minn)
47         {
48             minn=tmpmaxn;
49             root=u;
50         }
51     }
52     return d[u];
53 }
54 int main()
55 {
56     while(~scanf("%d",&n))
57     {
58         cont=0;
59         memset(vis,0,sizeof(vis));
60         memset(d,0,sizeof(d));
61         memset(head,-1,sizeof(head));
62         for(int i=0;i<n-1;i++)
63         {
64             int x,y,w;
65             scanf("%d%d%d",&x,&y,&w);
66             add(x,y,w);
67             add(y,x,w);
68         }
69         output=0;
70         root=-1;
71         minn=0x3f3f3f3f;
72         Dfs(1,-1);
73         printf("%d\n",root);
74     }
75 }