// kozos os.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
#include <vector>
#include <deque>

using namespace std;

struct adat
{
    bool lat;
    long long lep,gyerek;
    vector<long long>sz;
};

int n, m, a, b, akt,i,kezd,maxi;
vector<adat>x;
deque<long long>v;

int main()
{
    cin >> n;
    x.resize(n + 1);
    for (i = 1; i <= n-1; ++i)
    {
        cin >> a >> b;
        x[a].sz.push_back(b);
        x[b].sz.push_back(a);
        x[b].gyerek = 1;
    }
    for (i = 1; i <= n; ++i)
    {
        if (!x[i].gyerek)
        {
            kezd = i;
            break;
        }
    }
    maxi = -999;
    //cout << kezd;
    v.push_back(kezd);
    x[kezd].lat = true;
    while (!v.empty())
    {
        akt = v.front();
        v.pop_front();
        for (auto& e : x[akt].sz)
        {
            if (!x[e].lat)
            {
                x[e].lat = true;
                x[e].lep = x[akt].lep + 1;
                v.push_back(e);
            }
        }
    }
    for (i = 1; i <= n; ++i)
    {
        if (x[i].lep > maxi)
        {
            maxi = x[i].lep;
            kezd = i;
        }
    }
    cout << kezd;
    return 0;
}
/*
8
1 4
5 7
8 6
8 5
3 1
3 2
3 8
*/
// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

// Tips for Getting Started: 
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file