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