#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using pll = pair<ll, ll>;
using tlll = tuple<ll, ll, ll>;
constexpr ll MOD = 1e9 + 7;
//constexpr ll MOD = 998244353;
//constexpr ll MOD = ;
ll mod(ll A, ll M) {return (A % M + M) % M;}
constexpr ll INF = 1LL << 60;
template<class T> bool chmin(T& a, T b) {if (a > b) {a = b; return true;} return false;}
template<class T> bool chmax(T& a, T b) {if (a < b) {a = b; return true;} return false;}
ll divceil(ll A, ll B) {return (A + (B - 1)) / B;}
#define FINALANS(A) do {cout << (A) << '\n'; exit(0);} while (false)

vector<vector<ll>> G;
vector<ll> color;
void dfs(ll v)
{
  for (auto nv : G.at(v))
  {
    if (color.at(nv) != -1)
      continue;

    color.at(nv) = 1 - color.at(v);
    dfs(nv);
  }
}

int main()
{
  ll N;
  cin >> N;
  G.resize(N);
  for (ll i = 0; i < N - 1; i++)
  {
    ll u, v;
    cin >> u >> v;
    u--, v--;
    G.at(u).push_back(v);
    G.at(v).push_back(u);
  }

  color = vector<ll>(N, -1);
  color.at(0) = 0;
  dfs(0);

  ll Z = count(color.begin(), color.end(), 0LL);
  cout << min(Z, N - Z) << endl;
}