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 N = 2e5 + 10;
int n, tot, ans, mx, cnt, dif;
int head[N], num[N];
unsigned long long val[N], f[N];
map<unsigned long long, int> mp;
int read() {
  int ret = 0;
  char c = getchar();
  while (!isdigit(c)) c = getchar();
  while (isdigit(c)) ret = ret * 10 + (c ^ 48), c = getchar();
  return ret;
}
struct Tway {
  int v, nex;
} e[N];
void add(int u, int v) {
  e[++tot] = (Tway){v, head[u]};
  head[u] = tot;
  e[++tot] = (Tway){u, head[v]};
  head[v] = tot;
}
void ins(int x) {
  if (!num[x]) ++dif;
  ++num[x];
}
void del(int x) {
  --num[x];
  if (!num[x]) --dif;
}
int get(int x) { return mp.count(x) ? mp[x] : mp[x] = ++cnt; }
void dfs1(int x, int fa) {
  unsigned long long sum = 0;
  for (int i = head[x]; i; i = e[i].nex)
    if (e[i].v ^ fa) dfs1(e[i].v, x), sum += val[f[e[i].v]];
  f[x] = get(sum);
  ins(f[x]);
}
void dfs2(int x, int fa, int c) {
  del(f[x]);
  if (dif + 1 > mx) mx = dif + 1, ans = x;
  unsigned long long sum = 0;
  for (int i = head[x]; i; i = e[i].nex)
    if (e[i].v ^ fa) sum += val[f[e[i].v]];
  sum += val[c];
  for (int i = head[x]; i; i = e[i].nex) {
    int v = e[i].v;
    if (v == fa) continue;
    unsigned long long snow = sum - val[f[v]];
    ins(get(snow));
    dfs2(v, x, get(snow));
    del(get(snow));
  }
  ins(f[x]);
}
unsigned long long rnd() {
  return (unsigned long long)(rand() + 1) * 2333 +
         (unsigned long long)(rand() + 1) * 19260817 +
         (unsigned long long)((rand() + 1231) << 28);
}
int main() {
  n = read();
  for (int i = 1; i <= n * 2; ++i) val[i] = rnd();
  for (int i = 1; i < n; ++i) add(read(), read());
  dfs1(1, 0);
  dfs2(1, 0, 0);
  printf("%d\n", ans);
  return 0;
}
