#include <bits/stdc++.h>
using namespace std;
template <class T>
bool chmax(T &a, const T &b) {
  if (a < b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T>
bool chmin(T &a, const T &b) {
  if (b < a) {
    a = b;
    return 1;
  }
  return 0;
}
const long long INF = 1LL << 60;
const int inf = (1 << 30) - 1;
const int mod = 1e9 + 7;
int dx[8] = {1, 0, -1, 0, -1, -1, 1, 1};
int dy[8] = {0, 1, 0, -1, -1, 1, -1, 1};
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  int n;
  cin >> n;
  vector<int> a(n);
  for (int i = 0; i < (n); ++i) {
    cin >> a[i];
  }
  vector<int> dp(n);
  dp[0] = 1000;
  for (int i = 1; i < n; ++i) {
    dp[i] = dp[i - 1];
    for (int j = 0; j < i; ++j) {
      chmax(dp[i], dp[j] + dp[j] / a[j] * (a[i] - a[j]));
    }
  }
  cout << dp[n - 1] << endl;
}
