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

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n, u, v;
    cin >> n;
    vector<vector<int>> g(n);
    for(int i = 1; i < n; i++){
        cin >> u >> v;
        u--, v--;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    vector<array<int,2>> dp(n, {-1, -1});
    function<void(int,int)> dfs = [&](int v, int p){
        dp[v][0] = 0;
        dp[v][1] = 1;
        for(auto &&u:g[v]){
            if(u == p)continue;
            dfs(u, v);
            dp[v][0] += max(dp[u][0], dp[u][1]);
            dp[v][1] += dp[u][0];
        }
    };
    dfs(0, -1);
    cout << max(dp[0][0], dp[0][1]) << '\n';
}