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;
namespace io {
const int SI = 1 << 21 | 1;
char IB[SI], *IS, *IT, OB[SI], *OS = OB, *OT = OS + SI - 1, c, ch[100];
int f, t;
inline void flush() { fwrite(OB, 1, OS - OB, stdout), OS = OB; }
inline void pc(char x) {
  *OS++ = x;
  if (OS == OT) flush();
}
template <class I>
inline void rd(I &x) {
  for (f = 1, c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                              IS == IT ? EOF : *IS++)
                            : *IS++);
       c < '0' || c > '9';
       c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                       IS == IT ? EOF : *IS++)
                     : *IS++))
    if (c == '-') f = -1;
  for (x = 0; c >= '0' && c <= '9'; x = (x << 3) + (x << 1) + (c & 15),
      c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                      IS == IT ? EOF : *IS++)
                    : *IS++))
    ;
  x *= f;
}
inline void rds(char *s, int &x) {
  for (c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                       IS == IT ? EOF : *IS++)
                     : *IS++);
       c < 33 || c > 126;
       c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                       IS == IT ? EOF : *IS++)
                     : *IS++))
    ;
  for (x = 0; c >= 33 && c <= 126;
       s[++x] = c, c = (IS == IT ? (IT = (IS = IB) + fread(IB, 1, SI, stdin),
                                   IS == IT ? EOF : *IS++)
                                 : *IS++))
    ;
  s[x + 1] = '\0';
}
template <class I>
inline void print(I x, char k = '\n') {
  if (!x) pc('0');
  if (x < 0) pc('-'), x = -x;
  while (x) ch[++t] = x % 10 + '0', x /= 10;
  while (t) pc(ch[t--]);
  pc(k);
}
inline void prints(string s) {
  int x = s.length();
  while (t < x) pc(s[t++]);
  pc('\n'), t = 0;
}
struct Flush {
  ~Flush() { flush(); }
} flusher;
}  // namespace io
using io::print;
using io::prints;
using io::rd;
using io::rds;
const int N = 2e5 + 7;
int n, w[N], s[N], rt, v[N], ans1;
vector<pair<int, int> > e[N];
long double sum, sd, d[N], ans2 = 6e25;
void dfs(int x, int f, int S) {
  s[x] = 1;
  int o = 0;
  for (unsigned int i = 0; i < e[x].size(); i++) {
    int y = e[x][i].first;
    if (v[y] || y == f) continue;
    dfs(y, x, S), s[x] += s[y], o = max(o, s[y]);
  }
  o = max(o, S - s[x]);
  if (o <= (S >> 1)) rt = x;
}
void calc(int x, int f, int o, int z) {
  sum += pow(z, 1.5) * w[x], d[o] += pow(z, 0.5) * 1.5 * w[x];
  for (unsigned int i = 0; i < e[x].size(); i++) {
    int y = e[x][i].first;
    if (y == f) continue;
    calc(y, x, o, z + e[x][i].second);
  }
}
void dfs(int x, int S) {
  if (v[x]) return;
  v[x] = 1, sum = sd = 0;
  for (unsigned int i = 0; i < e[x].size(); i++) {
    int y = e[x][i].first;
    d[y] = 0, calc(y, x, y, e[x][i].second), sd += d[y];
  }
  if (sum < ans2) ans1 = x, ans2 = sum;
  for (unsigned int i = 0; i < e[x].size(); i++) {
    int y = e[x][i].first;
    if (sd - d[y] * 2 >= 0) continue;
    dfs(y, x, S);
    dfs(rt, S);
    break;
  }
}
int main() {
  rd(n);
  for (int i = 1; i <= n; i++) rd(w[i]);
  for (int i = 1, x, y, z; i < n; i++)
    rd(x), rd(y), rd(z), e[x].push_back(make_pair(y, z)),
        e[y].push_back(make_pair(x, z));
  dfs(1, 0, n);
  dfs(rt, n);
  printf("%d %.10Lf\n", ans1, ans2);
  return 0;
}
