#include <bits/stdc++.h>
using namespace std;
void solve() {
  int n;
  cin >> n;
  int a[n];
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  if (a[0] % 2 && a[n - 1] % 2 && n % 2) {
    cout << "Yes\n";
  } else
    cout << "No\n";
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int t;
  t = 1;
  while (t--) {
    solve();
  }
  return 0;
}
