#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  long long int ans = 1000;
  int counter = 1000;
  int a[n];
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  for (int i = 0; i < n - 1; i++) {
    if (a[i] < a[i + 1]) {
      counter = ans / a[i];
      ans -= (counter)*a[i];
      ans += counter * a[i + 1];
    }
  }
  cout << ans;
}
