#include<iostream>

#include<cstdio>

using namespace std;

int main()

{

    int n,a[],sum = ;

    cin >> n;

    for(int i = ;i <= n;i++)    cin >> a[i];

    for(int i = ;i <= n;i++)

    {

        int j,left = -,right = -;

        for(j = i-;j > ;j--)

        {

            if(a[j] < a[i])

            {

                left = j;

                break;

            }

        }

        if(left == -)    left = ;

        for(j = i+;j <= n;j++)

        {

            if(a[j] < a[i])

            {

                right = j;

                break;

            }

        }

        if(right == -)    right =    n+;

        sum = max(sum,(right-left-)*a[i]);

    }

    cout << sum << endl;

    return ;

}