#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int *p;
  p = new int[n];
  int nOdds = 0;
  bool allOdds = true;
  bool even = false;
  for (int i = 0; i < n; i++) {
    cin >> p[i];
    if (p[i] % 2 == 0) allOdds = false;
    if (p[i] % 2 != 2) nOdds++;
  }
  if (allOdds && n % 2 != 0)
    cout << "Yes";
  else if (p[0] % 2 != 0 && p[n - 1] % 2 != 0 && n % 2 != 0)
    cout << "Yes";
  else if (p[0] % 2 != 0 && p[n - 1] % 2 != 0 && n % 2 == 0)
    cout << "No";
  else if (allOdds && n % 2 == 0)
    cout << "No";
  else if (p[0] % 2 == 0 || p[n - 1] % 2 == 0)
    cout << "No";
  else {
    if (nOdds % 2 == 0)
      cout << "Yes";
    else
      cout << "No";
  }
  return 0;
}
