#include<iostream>
#include<cstdio>
#include<cstring>
#include <cstdlib>  
#include <math.h>
#include <cmath>
#include<cctype>
#include<string>
#include<set>
#include<iomanip>
#include <map>
#include<algorithm>
#include <functional>
#include<vector>
#include<climits>
#include<stack>
#include<queue>
#include <deque>
#include <climits>
#include <typeinfo>
#include <utility> 
#define all(x) (x).begin(),(x).end()
#define rep(i,m,n) for(int i = m;i < n;++i)
#define pb push_back
#define fore(i,a) for(auto &i:a)
#define rrep(i,m,n) for(int i = m;i >= n;--i)
#define INF INT_MAX/2
using namespace std;
using ll = long long;
using R = double;
using Data = pair<ll, vector<int>>;
const ll MOD = 1e9 + 7;
const ll inf = 1LL << 50;
struct edge { ll from; ll to; ll cost; };
typedef tuple<ll, ll, ll>T;
typedef pair<ll,ll>pll;

vector<int>e[101010];
int dp[101010][2];

void dfs(int cur,int p){
	dp[cur][0] = 1;
	dp[cur][1] = 0;
	fore(to, e[cur])if (to != p) {
		dfs(to, cur);
		dp[cur][0] += max(dp[to][0]-1,dp[to][1]);
		dp[cur][1] += max(dp[to][0],dp[to][1]);
	}
}


int main(){
	int n;
	cin >> n;
	
	rep(i, 0, n - 1) {
		int u, v;
		cin >> u >> v;
		u--, v--;
		e[u].pb(v);
		e[v].pb(u);
	}
	dfs(0,-1);
	cout << max(dp[0][0], dp[0][1]) << endl;
	
	return 0;
}