#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, ar[110];
  while (cin >> n) {
    for (int i = 0; i < n; i++) {
      cin >> ar[i];
    }
    if ((n % 2 == 1) && (ar[0] % 2 == 1) && (ar[n - 1] % 2 == 1))
      cout << "Yes" << endl;
    else
      cout << "No" << endl;
  }
}
