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