3
1 1 5
1 3 42
1 2 42
 2
42 23
1 2 10
 10
45792697 27183921 4791060 77070594 27286110 66957065 19283638 2944837 26775511 65379701
5 8 25
8 10 94
1 4 14
9 7 96
4 2 16
2 6 58
2 3 99
6 8 21
8 9 87
 5
3 1 2 6 5
1 2 3
2 3 1
4 3 9
5 3 1
 10
26 31 21 57 56 44 54 58 79 97
2 1 277
1 8 91
1 7 380
4 1 649
10 5 799
10 1 940
8 6 627
6 3 177
9 6 685
 10
8 100 62 38 26 51 26 23 77 32
6 8 29
4 1 82
7 8 66
7 10 67
8 9 98
6 1 14
1 5 48
3 1 58
2 9 90
 2
23 42
1 2 10
 1
42
 3
1 5 1
1 3 42
1 2 42
 10
1 1 1 1 1 1 1 1 1 1
1 2 5
1 3 5
1 4 5
1 5 5
1 6 5
1 7 5
1 8 5
1 9 5
1 10 5
 3
1 1 1
1 2 42
2 3 42
 3
5 1 1
1 3 42
1 2 24

3 1042.0638260857 1 727.3238618387 6 283959805416.40496826
 3 192.0000000000 1 13952642.4776933547 8 544327.1927847408 2 727.3238618387 1 0.0000000000 2 1042.0638260857 1 100.6230589875 2 544.3822186663 1 389.7666169867
#include<bits/stdc++.h>
using namespace std;
#define re register
int w[200100],sz[200100],szh,n;
bool bo[200100];
struct eg{int to,l;eg*nx;}e[400100],*la[200100],*cnt=e;
inline void addE(re int a,re int b,re int c)
{
	*++cnt=(eg){b,c,la[a]};la[a]=cnt;
	*++cnt=(eg){a,c,la[b]};la[b]=cnt;
}
double ans,nans=1e100;
int hv,ansc;
void clac(re int a,re int fa,re int len)
{
	ans+=sqrt(len)*w[a];
	for(re eg*i=la[a];i;i=i->nx)if(i->to!=fa)clac(i->to,a,len+i->l);
}
void clas(re int a,re int fa,re int len)
{
	ans+=len*sqrt(len)*w[a];
	for(re eg*i=la[a];i;i=i->nx)if(i->to!=fa)clas(i->to,a,len+i->l);
}
void dfs(re int a,re int fa)
{
	sz[a]=1;
	for(re eg*i=la[a];i;i=i->nx)if(!bo[i->to]&&i->to!=fa)dfs(i->to,a),sz[a]+=sz[i->to];
}
void dfs1(re int a,re int fa)
{
	bool hvb=1;
	for(re eg*i=la[a];i;i=i->nx)if(!bo[i->to]&&i->to!=fa)dfs1(i->to,a),hvb&=sz[i->to]<=szh/2;
	hvb&=(szh-sz[a])<=szh/2;
	if(hvb)hv=a;
}
void dc(re int a)
{
	dfs(a,0);szh=sz[a];
	dfs1(a,0);
	a=hv;
	bo[a]=1;
	ans=0;
	clas(a,0,0);
	if(ans<nans)nans=ans,ansc=a;
	re double nw=1e100;re int ck=0;
	for(re eg*i=la[a];i;i=i->nx)
	if(!bo[i->to]){
		ans=0;
		clac(i->to,a,i->l);
		if(ans<nw)nw=ans,ck=i->to;
	}
	if(ck)dc(ck);
}
int main()
{
	re int x,y,l;
	scanf("%d",&n);
	for(re int i=1;i<=n;i++)scanf("%d",&w[i]);
	for(re int i=1;i<n;i++)
	{
		scanf("%d%d%d",&x,&y,&l);
		addE(x,y,l);
	}
	dc(1);
	printf("%d %.10lf\n",ansc,nans);
}