#include <bits/stdc++.h>

#define speed cin.tie(0); ios::sync_with_stdio(0)
#define cinv(v) for (auto& e : v) cin >> e;
#define all(v) v.begin(), v.end()
#define has(s, e) s.count(e)

using namespace std;
using ll = long long;
using point = array<int, 2>;

int main() {
    speed;

    int N;
    cin >> N;
    set<int> meatS;
    for (int i = 0, a; i < N; i++) {
        cin >> a;
        meatS.insert(a);
    }
    
    cout << *meatS.rbegin() + N - meatS.size();
}