#include <bits/stdc++.h>
using namespace std;
const int MM = 1000000000;
const int MOD = MM + 7;
const int MAX = 510000;
template <class T>
inline bool chmin(T& a, T b) {
  if (a > b) {
    a = b;
    return true;
  }
  return false;
}
template <class T>
inline bool chmax(T& a, T b) {
  if (a < b) {
    a = b;
    return true;
  }
  return false;
}
const long long INF = 1LL << 60;
int main() {
  long long n;
  cin >> n;
  vector<long long> a(n);
  for (long long i = 0; i < n; i++) cin >> a[i];
  long long mon = 1000;
  long long st = 0;
  for (long long i = 0; i < n - 1; i++) {
    if (a[i] < a[i + 1]) {
      st = mon / a[i];
      mon %= a[i];
    } else {
      mon += st * a[i];
      st = 0;
    }
  }
  mon += st * a[n - 1];
  cout << mon << endl;
}
