#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int N;
  cin >> N;
  int beg, ending;
  cin >> beg;
  for (int i = 2; i < N; i++) {
    int garbage;
    cin >> garbage;
  }
  if (N > 1) {
    cin >> ending;
  } else {
    ending = beg;
  }
  if ((N & 1) && (beg & 1) && (ending & 1)) {
    cout << "Yes\n";
    return 0;
  }
  cout << "No\n";
  return 0;
}
