#include <bits/stdc++.h>
using namespace std;
template <class T>
inline bool chmax(T& a, T b) {
  if (a < b) {
    a = b;
    return true;
  }
  return false;
}
template <class T>
inline bool chmin(T& a, T b) {
  if (a > b) {
    a = b;
    return true;
  }
  return false;
}
const long long MOD = 1e9 + 7;
const long long INF = 1e18;
const int MAX = 510000;
const double pi = acos(-1);
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 (long long i = 0; i < (long long)(n); i++) cin >> a[i];
  a.erase(unique(a.begin(), a.end()), a.end());
  long long now = 1000;
  long long stock = 0;
  n = a.size();
  for (long long i = 0; i < (long long)(n - 1); i++) {
    if (a[i] < a[i + 1]) {
      stock += now / a[i];
      now -= (now / a[i]) * a[i];
      now += stock * a[i + 1];
      stock = 0;
      i++;
    } else
      continue;
  }
  cout << now << endl;
  return 0;
}
