#include <vector>
#include <cstdio>
#include <iostream>
using namespace std;

vector<int> adj[100100];
int memo[2][100100];

int calc(int i, int use, int p = -1) {
    if (memo[use][i] >= 0) return memo[use][i];
    int sum = use;
    for (int j : adj[i])
        if (j != p)
            sum += use ? calc(j, 0, i) : max(calc(j, 0, i), calc(j, 1, i));
    cerr << use << ' ' << i << ' ' << sum << endl;
    return memo[use][i] = sum;
}

int main() {
    int n; cin >> n;
    for (int i = 1; i < n; i++) {
        int x, y; scanf(" %d %d", &x, &y);
        adj[x].push_back(y); adj[y].push_back(x);
    }
    fill(memo[0], memo[0] + n + 1, -1);
    fill(memo[1], memo[1] + n + 1, -1);
    cout << max(calc(1, 1), calc(1, 0)) << endl;
}