#include <bits/stdc++.h>
using namespace std;
int arr[1000] = {0};
int main() {
  int n, m, i, j, k;
  cin >> n;
  for (i = 0; i < n; i++) cin >> arr[i];
  if (n % 2 == 0) {
    cout << "No" << endl;
    return 0;
  } else {
    if (arr[0] % 2 == 1 && arr[n - 1] % 2 == 1) {
      cout << "Yes" << endl;
    } else
      cout << "No" << endl;
  }
  return 0;
}
