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;
int N;
int w[200005];
int lnk[200005];
int pre[400005], tgt[400005], val[400005], cnt;
void add_E(int u, int v, int c) {
  pre[++cnt] = lnk[u], tgt[cnt] = v, val[cnt] = c, lnk[u] = cnt;
}
bool used[200005];
int rt;
int s[200005], f[200005];
void Get_siz(int x, int fa) {
  s[x] = 1;
  for (int e = lnk[x]; e; e = pre[e])
    if (tgt[e] != fa && !used[tgt[e]]) Get_siz(tgt[e], x), s[x] += s[tgt[e]];
}
void Get_rt(int x, int fa, int S) {
  f[x] = S - s[x];
  for (int e = lnk[x]; e; e = pre[e])
    if (tgt[e] != fa && !used[tgt[e]])
      Get_rt(tgt[e], x, S), f[x] = max(f[x], s[tgt[e]]);
  if (f[x] < f[rt]) rt = x;
}
double Delta[200005], sumval, ans = 1e18;
int anspos;
void Get_dis(int x, int fa, int dis, int y) {
  sumval += w[x] * pow(dis, 1.5), Delta[y] += w[x] * 1.5 * pow(dis, 0.5);
  for (int e = lnk[x]; e; e = pre[e])
    if (tgt[e] != fa) Get_dis(tgt[e], x, dis + val[e], y);
}
void DFZ(int x) {
  used[x] = 1;
  sumval = 0;
  double SDelta = 0;
  for (int e = lnk[x]; e; e = pre[e])
    Delta[tgt[e]] = 0, Get_dis(tgt[e], x, val[e], tgt[e]),
    SDelta += Delta[tgt[e]];
  if (sumval < ans) ans = sumval, anspos = x;
  for (int e = lnk[x]; e; e = pre[e])
    if (!used[tgt[e]])
      if (SDelta - 2 * Delta[tgt[e]] < 0) {
        rt = 0;
        Get_rt(tgt[e], x, s[tgt[e]]);
        Get_siz(rt, x);
        DFZ(rt);
        break;
      }
}
int main() {
  f[0] = 0x3f3f3f3f;
  scanf("%d", &N);
  for (int i = 1; i <= N; i++) scanf("%d", &w[i]);
  for (int i = 1; i < N; i++) {
    int u, v, c;
    scanf("%d%d%d", &u, &v, &c);
    add_E(u, v, c);
    add_E(v, u, c);
  }
  rt = 0;
  Get_siz(1, 1);
  Get_rt(1, 1, N);
  DFZ(rt);
  printf("%d %.7lf\n", anspos, ans);
}
