#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
ll n;
ll a[300005];
ll ans;
int main()
{
    ios_base::sync_with_stdio(false);
    cin>>n;
    for (int i=0; i<n-1; ++i)
    {
    ll uu, vv;
        cin>>uu>>vv;
        ++a[uu];
        ++a[vv];
    }
    for (int i=1; i<=n; ++i)
    {
        if (a[i]>2)
        {
            ans+=a[i]-2;
        }
    }
    cout<<ans;
}