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