#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(false);
  int n;
  cin >> n;
  int a[n], oddno = 0;
  for (int i = 0; i < n; ++i) {
    cin >> a[i];
  }
  if (n % 2 && a[0] % 2 && a[n - 1] % 2)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
  return 0;
}
