#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  int money1 = 1000;
  int money2 = 1000;
  int count = 0;
  cin >> n;
  vector<int> a(300);
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  for (int i = 0; i < n - 1; i++) {
    if (a[i] < a[i + 1]) {
      count = money1 / a[i];
      money1 -= count * a[i];
    }
    money1 += count * a[i + 1];
    count = 0;
  }
  for (int i = 0; i < n - 1; i++) {
    if (a[i] + 20 < a[i + 1]) {
      count = money2 / a[i];
      money2 -= count * a[i];
    }
    money2 += count * a[i + 1];
    count = 0;
  }
  cout << max(money1, money2) << endl;
}
