#include <bits/stdc++.h>

#define st first
#define nd second
#define pb push_back
#define rep(i, a, b) for(int i = (a); i < (b); ++i)
#define sci(x) int x; cin >> x;
#define scvi(v, n) vector<int> v(n); rep(i, 0, n) cin >> v[i];

using namespace std;

typedef long long ll;
typedef pair<int, int> ii;
typedef vector<int> vi;

int deg[300042];

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0);

    int n;
    cin >> n;
    for (int i=0; i<n-1; i++)
    {
        int a, b;
        cin >> a >> b;
        deg[a]++;
        deg[b]++;
    }


    int ans = 0;
    for (int i=1; i<=n; i++)
        ans += (deg[i] == 1);
    cout << ans - 2 << "\n";


    return 0;
}