#include <fstream>
#define L 200005

using namespace std;

ifstream fin("strabunica.in");
ofstream fout("strabunica.out");

unsigned int n, v[L];

unsigned long long best, comp, mx, nr, mn;

int main()
{
    fin >> n;
    for (unsigned int i = 1; i <= n; i++){
        fin >> v[i];
        if (v[i] > mx) mx = v[i];
    }
    mn = v[1];
    best = v[1];
    nr = 1;
    for (unsigned int i = 2; i <= n; i++){
        if (v[i] < mn) mn = v[i];
        comp = mn * (nr + 1);
        if (v[i] >= comp){
            mn = v[i];
            nr = 1;
        }
        else{
            nr++;
            if (nr * mn > best) best = nr * mn;
        }
    }
    fout << max(mx, best);
    return 0;
}