#include <iostream>
#include <fstream>
#include <deque>
using namespace std;
ifstream fin("strabunica.in");
ofstream fout("strabunica.out");
int n, k, a[500005];

int main()
{
    int i, j, m, sol = -1;
    fin >> n;
    for (i = 1; i <= n; i++)
        fin >> a[i];
    for (i = 1; i <= n; i++)
    {
        m = a[i];
        for (j = i + 1; j <= n; j++)
        {
            m = min(m, a[j]);
            sol = max(sol,(j - i + 1) * m);
        }
    }
    fout << sol;
    return 0;
}