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