#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=1;i<=n;i++)
#define pb push_back
#define mp make_pair
#define data dataa
using LL=long long;
using ULL=unsigned long long;
using LD=long double;
const int N=int(2e5)+10;
vector<int>g[N];
int n,ans;
int dfs(int p,int fa)
{
    int sum=0;
    for(auto i:g[p])
    {
        if(i==fa)continue;
        sum+=dfs(i,p);
    }
    if(sum==0)return 1;
    if(sum==1){ans++;return 0;}
    ans+=(sum-1)*2+1;
    return 0;
}
int main()
{
    scanf("%d",&n);
    rep(i,n-1)
    {
        int x,y;scanf("%d%d",&x,&y);
        g[x].pb(y);g[y].pb(x);
    }
    int x=dfs(1,0);
    printf("%d\n",ans+(x>0)*2);
    return 0;
}