#include<bits/stdc++.h>
using namespace std;
bool cmp(int x,int y){
	return x<y;
}
int n,a[100005],c=0,s=0,lc=0;
int main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>a[i];
	}
	sort(a+1,a+n+1,cmp);
	for(int i=1;i<=n;i++){
		if(a[i+1]==a[i]){
			c++;
		}
		else{
			s+=(a[i]-lc)*6+5+c;
			lc+=a[i]-lc;
			c=1;
		}
	}
	s+=lc*4;
	cout<<s;
}