//
//
//  Codeforces: ganariya
//  AtCoder: ganariya2525
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//include
//------------------------------------------
#include <vector>
#include <list>
#include <map>
#include <unordered_map>
#include <climits>
#include <set>
#include <unordered_set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>
#include <queue>
#include <random>
#include <complex>
#include <regex>
#include <locale>
#include <random>
#include <type_traits>

using namespace std;

#define SHOW_VECTOR(v) {std::cerr << #v << "\t:";for(const auto& xxx : v){std::cerr << xxx << " ";}std::cerr << "\n";}
#define SHOW_MAP(v){std::cerr << #v << endl; for(const auto& xxx: v){std::cerr << xxx.first << " " << xxx.second << "\n";}}

using LL = long long;

//~~~~~~~~~~~~~~~~~~~~~_(＾～＾ ｣ ∠)_~~~~~~~~~~~~~~~~~~~~~

constexpr int MAX_N = 200020;

vector<int> G[MAX_N];

void dfs(int v, int p, vector<int> &dist, int d) {
    dist[v] = d;
    for (auto to: G[v]) {
        if (p != to) {
            dfs(to, v, dist, d + 1);
        }
    }
}

int main() {

    int N;
    cin >> N;

    for (int i = 0; i < N - 1; i++) {
        int a, b;
        cin >> a >> b;
        a--, b--;
        G[a].push_back(b);
        G[b].push_back(a);
    }

    vector<int> dist(N, INT_MAX);
    int v = 0;

    for (int i = 0; i < 10; i++) {
        dfs(v, -1, dist, 0);
        v = max_element(dist.begin(), dist.end()) - dist.begin();
    }

    int d = dist[v] + 1;

    if(d % 3 == 2) cout << "Second" << endl;
    else cout << "First" << endl;

    return 0;
}










































Measured memory_bytes: 24448