#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, arr[100];
  cin >> n;
  for (int i = 0; i < n; ++i) {
    cin >> arr[i];
  }
  if (n % 2 == 0)
    cout << "No";
  else {
    if (arr[0] % 2 == 1 && arr[n - 1] % 2 == 1)
      cout << "Yes";
    else
      cout << "No";
  }
}
