#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef pair<ll, ll> p_ll;

template<class T>
void debug(T itr1, T itr2) { auto now = itr1; while(now<itr2) { cout << *now << " "; now++; } cout << endl; }
#define repr(i,from,to) for (ll i=(ll)from; i<(ll)to; i++)
#define all(vec) vec.begin(), vec.end()
#define rep(i,N) repr(i,0,N)
#define per(i,N) for (int i=(int)N-1; i>=0; i--)

const ll MOD = pow(10,9)+7;
const ll LLINF = pow(2,61)-1;
const int INF = pow(2,30)-1;

vector<ll> fac;
void c_fac(int x=pow(10,6)+10) { fac.resize(x,true); rep(i,x) fac[i] = i ? (fac[i-1]*i)%MOD : 1; }
ll modpow(ll x, ll p) { ll result = 1, now = 1, pm = x; while (now<=p) { if (p&now) { result = result * pm % MOD; } now*=2; pm = pm*pm % MOD; } return result; }
ll inv(ll a, ll m=MOD) { ll b = m, x = 1, y = 0; while (b!=0) { int d = a/b; a -= b*d; swap(a,b); x -= y*d; swap(x,y); } return (x+m)%m; }
ll nck(ll n, ll k) { return fac[n]*inv(fac[k]*fac[n-k]%MOD)%MOD; }
ll gcd(ll a, ll b) { if (a<b) swap(a,b); return b==0 ? a : gcd(b, a%b); }
ll lcm(ll a, ll b) { return a/gcd(a,b)*b; }

vector<vector<ll>> adj;
vector<priority_queue<ll>> vpq;

void marge(ll x, ll y) {
  if (vpq[x].size()<vpq[y].size()) swap(vpq[x],vpq[y]);
  while (vpq[y].size()) {
    vpq[x].push(vpq[y].top());
    vpq[y].pop();
  }
}

void dfs(ll n=0, ll p=-1) {
  for (auto x: adj[n]) {
    if (x==p) continue;
    dfs(x,n);
    marge(n,x);
  }
  ll ma = 1;
  vector<ll> cnt(2,-1);
  rep(i,2) {
    if (vpq[n].size()) {
      ma += vpq[n].top();
      cnt[i] = vpq[n].top();
      vpq[n].pop();
    }
  }
  if (cnt[0]%2||cnt[1]%2) vpq[n].push(ma);
  else if (n==0) { vpq[n].push(ma-1); vpq[n].push(1); }
  else { vpq[n].push(ma-2); vpq[n].push(1); vpq[n].push(1); }
}

int main() {
  ll N; cin >> N;
  adj.resize(N);
  rep(i,N-1) {
    ll A, B; cin >> A >> B; A--; B--;
    adj[A].push_back(B);
    adj[B].push_back(A);
  }
  vpq.resize(N);
  dfs();
  // while (vpq[0].size()) { cout << vpq[0].top() << " "; vpq[0] .pop(); cout << endl; }
  ll result = vpq[0].top();
  cout << result << endl;
  return 0;
}