#include <bits/stdc++.h>
using namespace std;
int n;
int a[102];
int main() {
  cin >> n;
  for (int i = 0; i < n; ++i) cin >> a[i];
  puts((n % 2 == 1) && (a[0] % 2 == 1) && (a[n - 1] % 2 == 1) ? "Yes" : "No");
  return 0;
}
