#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
#define FOR(i,m,n) for(int i=(m);i<(n);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
using ll = long long;
constexpr int INF = 0x3f3f3f3f;
constexpr long long LINF = 0x3f3f3f3f3f3f3f3fLL;
constexpr double EPS = 1e-8;
constexpr int MOD = 1000000007;
// constexpr int MOD = 998244353;
constexpr int dy[] = {1, 0, -1, 0}, dx[] = {0, -1, 0, 1};
constexpr int dy8[] = {1, 1, 0, -1, -1, -1, 0, 1}, dx8[] = {0, -1, -1, -1, 0, 1, 1, 1};
template <typename T, typename U> inline bool chmax(T &a, U b) { return a < b ? (a = b, true) : false; }
template <typename T, typename U> inline bool chmin(T &a, U b) { return a > b ? (a = b, true) : false; }
struct IOSetup {
  IOSetup() {
    std::cin.tie(nullptr);
    std::ios_base::sync_with_stdio(false);
    std::cout << fixed << setprecision(20);
  }
} iosetup;

bool is_bipartite(const std::vector<std::vector<int>> &graph, std::vector<int> &color) {
  int n = graph.size();
  color.assign(n, -1);
  std::function<bool(int, int)> dfs = [&graph, &color, &dfs](int ver, int now) -> bool {
    color[ver] = now;
    for (int e : graph[ver]) {
      if (color[e] == now || (color[e] == -1 && !dfs(e, now ^ 1))) return false;
    }
    return true;
  };
  for (int i = 0; i < n; ++i) {
    if (color[i] == -1 && !dfs(i, 0)) return false;
  }
  return true;
}

int main() {
  int n; cin >> n;
  vector<vector<int>> graph(n);
  REP(_, n - 1) {
    int a, b; cin >> a >> b; --a; --b;
    graph[a].emplace_back(b);
    graph[b].emplace_back(a);
  }
  vector<int> color;
  assert(is_bipartite(graph, color));
  int side = count(ALL(color), 1);
  cout << min(side, n - side) << '\n';
  return 0;
}