#include <iostream>
#include <algorithm>
#include <iomanip>
#include <vector>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <tuple>
#include <cmath>
#include <numeric>
#include <functional>
#include <cassert>

#define debug_value(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << #x << "=" << x << endl;
#define debug(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << x << endl;

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

using namespace std;
typedef long long ll;

template<typename T>
vector<vector<T>> vec2d(int n, int m, T v){
    return vector<vector<T>>(n, vector<T>(m, v));
}

template<typename T>
vector<vector<vector<T>>> vec3d(int n, int m, int k, T v){
    return vector<vector<vector<T>>>(n, vector<vector<T>>(m, vector<T>(k, v)));
}

template<typename T>
void print_vector(vector<T> v, char delimiter=' '){
    if(v.empty()) {
        cout << endl;
        return;
    }
    for(int i = 0; i+1 < v.size(); i++) cout << v[i] << delimiter;
    cout << v.back() << endl;
}

using P = pair<ll, ll>;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << setprecision(10) << fixed;
    int n; cin >> n;
    vector<ll> a(n);
    for(int i = 0; i < n; i++) cin >> a[i];
    sort(a.begin(), a.end());
    auto calc = [&](){
        vector<ll> from_right(n);
        vector<P> buf = {P(a.back(), a.back())};
        for(int i = n-2; i >= 0; i--){
            auto [l, r] = buf.back();
            ll ans = from_right[i+1];
            if(l > a[i]){
                from_right[i] = ans;
                buf.push_back({a[i], a[i]});
            }else{
                buf.pop_back();
                ans += r-l+1;
                l = a[i];
                r++;
                while(!buf.empty()){
                    auto [l0, r0] = buf.back();
                    if(l0 == r){
                        ans += r0-l0+1;
                        r = r0+1;
                        buf.pop_back();
                    }else{
                        assert(l0 > r);
                        break;
                    }
                }
                from_right[i] = ans;
                buf.push_back({l, r});
            }
            
            // for(auto [l, r]: buf) cout << l << ',' << r << ' ';
            // cout << endl;
        }
        return from_right;
    };
    auto r = calc();
    // print_vector(r);
    for(int i = 0; i < n; i++) a[i] *= -1;
    reverse(a.begin(), a.end());
    auto l = calc();
    for(int i = 0; i < n; i++) a[i] *= -1;
    reverse(a.begin(), a.end());
    reverse(l.begin(), l.end());
    ll ans = 1e18;
    for(int i = 0; i < n; i++) chmin(ans, l[i]+r[i]);
    cout << ans << endl;
}