#include <bits/stdc++.h>
using namespace std;
const int MAXN = 100005;
const int INF = 1000000009;
const long long MAXK = 100000;
int a[MAXN];
int main() {
  std::ios_base::sync_with_stdio(false);
  std::cin.tie(nullptr);
  int n;
  cin >> n;
  for (int i = 0; i < n; ++i) {
    cin >> a[i];
  }
  if (n % 2 == 0) {
    cout << "No";
    return 0;
  }
  if (a[0] % 2 == 1 && a[n - 1] % 2 == 1) {
    cout << "Yes";
    return 0;
  }
  cout << "No";
  return 0;
}
