10
6 8
3 10
1 9
6 1
8 2
5 7
3 6
10 4
3 5
 1
 5
1 2
2 3
3 4
4 5
 7
2 3
2 6
1 2
3 7
6 5
3 4
 10
8 4
8 10
8 1
8 2
5 9
5 3
5 7
8 5
5 6
 10
8 6
3 4
10 9
7 10
1 3
4 2
6 1
5 8
9 5
 10
1 10
6 9
5 4
1 3
1 2
3 8
6 7
8 6
1 5
 20
13 4
7 6
9 13
9 2
9 16
4 18
16 5
11 15
16 14
13 12
13 8
16 17
7 1
9 19
17 3
15 20
1 11
2 7
5 10
 3
1 2
1 3
 50
18 47
18 12
42 16
21 44
43 39
20 27
25 1
11 29
9 24
19 42
3 34
16 38
14 48
23 41
8 43
29 2
40 4
45 36
43 9
49 3
41 17
41 15
35 49
43 20
5 32
34 46
8 21
43 45
29 40
39 26
27 33
24 50
38 7
39 19
43 31
24 10
3 14
39 22
43 23
47 13
20 11
25 8
16 30
44 18
19 37
39 5
49 28
25 35
46 6
 15
11 2
5 13
9 4
5 7
11 5
13 14
2 10
3 11
7 1
7 6
10 15
9 12
2 9
10 8
 31
15 2
23 19
11 4
26 6
1 20
14 11
19 13
26 12
12 27
20 14
22 21
4 16
10 18
5 23
4 31
12 8
2 17
19 30
14 26
2 28
22 7
23 9
20 5
5 15
9 29
15 10
6 25
6 24
9 3
11 22
 63
34 40
43 62
33 43
49 6
17 47
26 13
35 15
40 16
17 44
37 34
18 55
57 10
16 14
39 56
36 5
4 33
4 59
54 24
37 45
21 31
57 2
19 8
43 41
49 48
15 19
35 4
15 63
30 50
11 30
59 18
20 46
18 1
33 17
31 22
40 54
63 49
29 25
46 9
16 3
42 23
59 7
54 53
42 38
8 60
8 58
7 51
36 28
63 36
21 57
25 37
45 20
25 35
19 26
20 42
30 32
11 39
7 12
31 52
45 21
26 27
34 11
46 61

9
 1
 1
 1
 1
 2
 10
 18
 2
 13
 1
 3
 1

#include <bits/stdc++.h>
using namespace std;
const int maxn = 2e5 + 50;
unsigned long long seed[maxn];
unsigned long long Rand() {
  return ((unsigned long long)rand() << 48) |
         ((unsigned long long)rand() << 32) |
         ((unsigned long long)rand() << 16) | rand();
}
vector<int> G[maxn];
unsigned long long h[maxn];
map<unsigned long long, int> mp, cnt;
int tot, sum, ans;
void dfs_init(int x, int par) {
  h[x] = seed[0];
  for (auto v : G[x]) {
    if (v == par) continue;
    dfs_init(v, x);
    h[x] += seed[mp[h[v]]];
  }
  if (mp.count(h[x]) == 0) mp[h[x]] = ++tot;
  cnt[h[x]]++;
}
int idx = 1;
void dfs(int x, int par, unsigned long long H) {
  if (x > 1) {
    cnt[h[x]]--;
    if (cnt[h[x]] == 0) --sum;
    h[x] += seed[mp[H]];
    if (mp.count(h[x]) == 0) mp[h[x]] = ++tot;
    cnt[h[x]]++;
    if (cnt[h[x]] == 1) ++sum;
  }
  if (sum > ans) idx = x, ans = sum;
  cnt[h[x]]--;
  if (cnt[h[x]] == 0) --sum;
  for (auto v : G[x]) {
    if (v == par) continue;
    unsigned long long t = h[x] - seed[mp[h[v]]];
    cnt[t]++;
    if (cnt[t] == 1) sum++;
    if (!mp.count(t)) mp[t] = +tot;
    dfs(v, x, t);
    cnt[t]--;
    if (cnt[t] == 0) --sum;
  }
  if (x > 1) h[x] -= seed[mp[H]];
  cnt[h[x]]++;
  if (cnt[h[x]] == 1) ++sum;
}
int main() {
  srand(time(0));
  for (int i = 0; i < maxn; ++i) seed[i] = Rand();
  int n;
  scanf("%d", &n);
  for (int i = 0; i < n - 1; ++i) {
    int x, y;
    scanf("%d%d", &x, &y);
    G[x].push_back(y);
    G[y].push_back(x);
  }
  dfs_init(1, 1);
  ans = sum = tot;
  dfs(1, 1, 0);
  cout << idx << endl;
  return 0;
}
