#include <bits/stdc++.h>
using namespace std;

#ifdef _RUTHEN
#include "debug.hpp"
#else
#define show(...) true
#endif

using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); i++)
template <class T> using V = vector<T>;

map<int, int> mp[200005];

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int N;
    cin >> N;
    V<V<int>> G(N);
    rep(i, N - 1) {
        int x, y;
        cin >> x >> y;
        x--, y--;
        G[x].push_back(y);
        G[y].push_back(x);
    }
    auto rec = [&](auto f, int cur, int par) -> void {
        for (auto &nex : G[cur]) {
            if (nex == par) continue;
            f(f, nex, cur);
            for (auto &[val, cnt] : mp[nex]) {
                if (val > 0) mp[cur][val] += cnt;
            }
        }
        if (mp[cur].size() == 0) {
            mp[cur][1] += 1;
            return;
        }
        auto [val, cnt] = *mp[cur].rbegin();
        if (cnt >= 2) {
            mp[cur][val] -= 2;
            if (mp[cur][val] == 0) mp[cur].erase(val);
            mp[cur][2 * val + 1] += 1;
        } else {
            mp[cur].erase(val);
            int ret = val;
            if (mp[cur].size() > 0) {
                auto [val2, cnt2] = *mp[cur].rbegin();
                mp[cur][val2] -= 1;
                if (mp[cur][val2] == 0) mp[cur].erase(val2);
                ret += val2;
            }
            mp[cur][ret + 1] += 1;
        }
        return;
    };
    rec(rec, 0, -1);
    int ans = (*mp[0].rbegin()).first;
    cout << ans << '\n';
    return 0;
}