#include <iostream>
#include <cstdio>
using namespace std;
const int N = 1010;
int h[N];
int main(){
    int n;  cin >> n;
    for(int i = 1; i <= n; i ++ )   scanf("%d", &h[i]);
    int res = 0;
    for(int i = 1; i <= n; i ++ ){
        int l = i, r = i;
        while(l > 0 && h[l] >= h[i])    l -- ;
        while(r <= n && h[r] >= h[i])   r ++ ;
        res = max(res, (r - l - 1) * h[i]);
    }
    cout << res << endl;
    return 0;
}