#include "bits/stdc++.h" using namespace std; #define int long long #define ll long long typedef pair<int, int> P; #define mod 1000000007 #define INF (1LL<<60) #define rep(i,n) for(int i=0, i##_len=(n); i<i##_len; ++i) #define YES cout << "YES" << endl; #define Yes cout << "Yes" << endl; #define NO cout << "NO" << endl; #define No cout << "No" << endl; signed main(){ int N; cin >> N; vector<vector<int>> g; g.assign(N, vector<int>()); rep(i, N - 1){ int a, b; cin >> a >> b; a--; b--; g[a].push_back(b); g[b].push_back(a); } int cnt = 0; rep(i, N){ if (g[i].size() == 1) cnt++; } cout << cnt-2 << endl; return 0; }