#include <bits/stdc++.h>
using namespace std;
using ll=long long;
using ld=long double;
ld pie=3.141592653589793;
ll inf=2000000000000000000;
ll mod=998244353;
int main(){
    ll n;
    cin >> n;
    vector<ll>a(n);
    for (ll i = 0; i < n; i++)
    {
        cin >> a[i];
    }
    vector<ll>x;
    x.push_back(n);
    for (ll i = 0; i < n; i++)
    {
        if (a[i]>n)
        {
            x.push_back(a[i]);
        }
    }
    sort(x.begin(),x.end());
    ll ans=0;
    for (ll i = 1; i < x.size(); i++)
    {
        ans+=x[i]-x[i-1];
    }
    cout << ans << endl;
}