#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 == 0) {
    cout << "No" << endl;
    return 0;
  } else {
    if (arr[0] % 2 != 0 && arr[n - 1] % 2 != 0)
      cout << "Yes" << endl;
    else
      cout << "No" << endl;
  }
  return 0;
}
