#include 

using namespace std;

int main()
{
    int n;
    cin >> n;
    int najmal = 2000000000;
    int najgolem = -2000000000;
    int niza[n];
    for (int i = 0; i < n; i += 1)
    {
        cin >> niza[i];
    }
    for (int a = 0; a < n; a += 1)
    {
        if (najmal > niza[a])
        {
            najmal = niza[a];
        }
    }
    for (int b = 0; b < n; b += 1)
    {
        if (najgolem < niza[b])
        {
            najgolem = niza[b];
        }
    }
    cout << najmal + najgolem << endl;
    return 0;
}