#include #include #include #include #include #include #include #include #include #include #include #include #include #pragma region using namespace std; #define FOR(i,r,n) for(ll i = (ll)(r); i < (ll)(n); i++) #define rep(i,n) FOR(i,0LL,n) #define RFOR(i,r,n) for(ll i=(ll)(n-1);i>=r;i--) #define rrep(i,n) RFOR(i,0LL,n) #define all(x) x.begin(),x.end() #define rall(x) x.rbegin(),x.rend() #define COUNT(a,y,x) upper_bound(all(a), y) - lower_bound(all(a), x) #define UNIQUE(a) sort(all(a)); a.erase(unique(all(a)), a.end()) #define pb push_back #define endl '\n' typedef long long int ll; typedef vector vll; typedef vector vvll; typedef pair pll; typedef vector vpll; typedef vector vs; typedef map MAP; const ll inf = 2222222222222222222LL; const ll mod = 1000000007LL; ll n = 0, m = 0, ans = 0, tmp = 0, ma = -inf, mi = inf; string s; bool ok; ll dx[9] = { 0,1,-1,0,0,1,1,-1,-1 }, dy[9] = { 0,0,0,1,-1,1,-1,1,-1 }; #pragma endregion #define MAX 222222 vll edge[MAX]; bool dfs(ll cur,ll pre) { bool ret = false; rep(i, edge[cur].size()) if (edge[cur][i] != pre) ret |= !(dfs(edge[cur][i], cur)); if (!ret) ans++; return ret; } int main(void) { ios::sync_with_stdio(false); cin.tie(0); cin >> n; rep(i, n - 1) { ll a, b; cin >> a >> b; edge[a].pb(b); edge[b].pb(a); } dfs(1, 0); cout << ans << endl; return 0; }