#include using namespace std; #define REP(i,n) for(ll i=0;i<(ll)n;i++) #define dump(x) cerr << "Line " << __LINE__ << ": " << #x << " = " << (x) << "\n"; #define spa << " " << #define fi first #define se second #define ALL(a) (a).begin(),(a).end() #define ALLR(a) (a).rbegin(),(a).rend() using ld = long double; using ll = long long; using ull = unsigned long long; using pii = pair; using pll = pair; using pdd = pair; template using V = vector; template using P = pair; template vector make_vec(size_t n, T a) { return vector(n, a); } template auto make_vec(size_t n, Ts... ts) { return vector(n, make_vec(ts...)); } template ostream& operator << (ostream& os, const pair v){os << "(" << v.first << ", " << v.second << ")"; return os;} template ostream& operator<<(ostream &os, const vector &v) { for (auto &e : v) os << e << ' '; return os; } template ostream& operator<<(ostream& os, const vector> &v){ for(auto &e : v){os << e << "\n";} return os;} struct fast_ios { fast_ios(){ cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_; template void UNIQUE(vector &x) {sort(ALL(x));x.erase(unique(ALL(x)), x.end());} template bool chmax(T &a, const T &b) { if (a bool chmin(T &a, const T &b) { if (a>b) { a=b; return 1; } return 0; } void fail() { cout << -1 << '\n'; exit(0); } inline int popcount(const int x) { return __builtin_popcount(x); } inline int popcount(const ll x) { return __builtin_popcountll(x); } template void debug(vector>&v,ll h,ll w){for(ll i=0;i void debug(vector&v,ll n){if(n!=0)cerr<>; int main(){ ll N; cin >> N; V u(N-1), v(N-1); REP(i, N-1) cin >> u[i] >> v[i], u[i]--, v[i]--; Graph G(N); REP(i, N-1){ G[u[i]].push_back(v[i]); G[v[i]].push_back(u[i]); } V dp1(N, 0), dp2(N, 0); auto dfs = [&](auto self, ll now, ll par)->void{ ll res1 = 1, res2 = 0; for(auto nx: G[now]){ if(nx == par) continue; self(self, nx, now); res1 += dp2[nx]; res2 += max(dp1[nx], dp2[nx]); } dp1[now] = res1; dp2[now] = res2; return; }; dfs(dfs, 0, -1); cout << N - max(dp1[0], dp2[0]) << endl; return 0; }