#include <bits/stdc++.h>
using namespace std;
int main() {
	int n,a[10001],min1 = 1e9,max1 = 0;
	cin >> n;
	for (int i = 1;i <= n; i++) {
		cin >> a[i];
	}
	for (int i = 1;i <= n; i++) {
		for (int j = 1;j <= n + 1 - i; j ++) {
			for (int k = j;k <= i + j - 1; k++) {
				if(a[k] < min1) {
					min1 = a[k];
				}
			}
			if (max1 < min1 * i) {
				max1 = min1 * i;
			}
			min1 = 1e9;
		}
	}
	cout << max1 << endl;
 	return 0;
}