#include <bits/stdc++.h>
using namespace std;
template <typename T>
std::ostream &operator<<(std::ostream &out, vector<T> &v) {
  for (typename vector<T>::size_type i = 0; i < v.size(); ++i)
    out << v[i] << " ";
  out << "\n";
  return out;
}
template <typename T, typename N>
std::ostream &operator<<(std::ostream &out, vector<pair<T, N> > &v) {
  for (size_t i = 0; i < v.size(); ++i)
    out << "(" << v[i].first << ", " << v[i].second << ") ";
  out << "\n";
  return out;
}
template <typename T>
std::ostream &operator<<(std::ostream &out, vector<vector<T> > &v) {
  for (size_t i = 0; i < v.size(); ++i) {
    for (size_t j = 0; j < v[i].size(); ++j) {
      out << v[i][j] << " ";
    }
    out << "\n";
  }
  return out;
}
int main() {
  std::ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int n;
  cin >> n;
  vector<int> value(n);
  for (int i = 0; i < n; ++i) {
    cin >> value[i];
  }
  vector<int> peaks;
  for (int i = 1; i < n; ++i) {
    peaks.push_back(value[i] - value[i - 1]);
  }
  int money = 1000, stocks = 0, highest_peak = 0;
  for (int i = 0; i < n - 1; ++i) {
    if (peaks[i] > highest_peak) {
      stocks = money / value[i];
      money %= value[i];
      money += value[i + 1] * stocks;
      highest_peak = peaks[i];
    }
  }
  cout << money << "\n";
  return 0;
}
