#define _USE_MATH_DEFINES
#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define MT make_tuple
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
#define RT return
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;
using vll = vector<ll>;

int N;
vi G[100005];

int dp[100005][2];
int f(int u, int p, int flag) {
    int &re = dp[u][flag];
    if (re != -1)RT re;
    int s = 0, t = 0;
    each(v, G[u])if (v != p) {
        s += f(v, u, 1);
        t += f(v, u, 0);
    }
    return re = max(s + (1 - flag), t);
}

void solve() {
    cin >> N;
    rep(i, N - 1) {
        int u, v;
        cin >> u >> v;
        G[u].push_back(v);
        G[v].push_back(u);
    }
    MEM(dp, -1);
    cout << f(1, 0, 0) << endl;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout << fixed << setprecision(15);
	solve();
	return 0;
}