#include<iostream>
#include<algorithm>
#define endl "\n"
using namespace std;

long long n, a[100001], m, cnt;

void read()
{
    cin>>n;
    for(long long i=1;i<=n;i++)
    {
        cin>>a[i];
    }
    sort(a+1,a+n+1);
    for(long long i=n;i>=1;i--)
    {
        a[i] += cnt;
        cnt++;
        if(a[i] > m) m = a[i];
    }
    cout<<m<<endl;
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    freopen("destruction.in", "r", stdin);
    freopen("destruction.out", "w", stdout);
    read();
	return 0;
}