#include <bits/stdc++.h>
using namespace std;

using ll = long long int;
using ull = unsigned long long int;
using P = pair<int, int>;
using P3 = pair<int,P>;
using PP = pair<P, P>;
constexpr int INF32 = 1 << 30;
constexpr ll INF64 = 1LL << 62;
// constexpr ll MOD = 1000000007;
constexpr ll MOD = 998244353;
constexpr int di[] = {0, 1, 0, -1};
constexpr int dj[] = {1, 0, -1, 0};
constexpr int di8[] = {0, 1, 1, 1, 0, -1, -1, -1};
constexpr int dj8[] = {1, 1, 0, -1, -1, -1, 0, 1};
constexpr double EPS = 1e-10;
const double PI = acos(-1);

#define ALL(v) (v).begin(),(v).end()
#define REP(i,n) for(int i=0,i_len=n; i<i_len; ++i)

template<typename T1,typename T2> bool chmax(T1 &a, T2 b) { if (a<b) { a=b; return 1; } return 0; }
template<typename T1,typename T2> bool chmin(T1 &a, T2 b) { if (b<a) { a=b; return 1; } return 0; }

int solve(){
    int n;
    cin >> n;
    vector<int> a(n), pos(n);
    vector<bool> used(n);
    REP(i,n){
        cin >> a[i];
        a[i]--;
        pos[a[i]] = i;
    }
    int ans = 0;
    REP(i,n){
        if(!used[i]){
            ans++;
            used[i] = true;
            if(pos[i]>0) used[a[pos[i]-1]] = true;
        }
    }
    cout << ans << endl;
    return 0;
}

int main(){
    cin.tie(0); ios::sync_with_stdio(0); cout<<fixed<<setprecision(20);
    // int t; cin >> t; for(int i=0;i<t;i++) solve();
    // while(!solve());
    solve();
    return 0;
}