include <bits/stdc++.h>

using namespace std; int main() { long long n = 0 , maxg = 0 , dummyvalue = 0; cin >> n; long long h[n]; for (long long i = 0 ; i < n ; i++) { cin >> h[i]; } for (long long i = 0 ; i < n ; i++) { for (long long j = i + 1 ; j < n ; j++) { dummyvalue = min(h[i] , h[j]) * (j - i); maxg = max(dummyvalue , maxg); } } cout << maxg; }