#include <bits/stdc++.h>
using namespace std;
const long long MOD = 1e9 + 7;
const long long SIZE = 100000;
const int INF = 0x3f3f3f3f;
const long long ll_INF = 0x3f3f3f3f3f3f3f3f;
const long double PI = acos(-1);
const long long MAXN = numeric_limits<long long>::max();
const long long MAX = 2000000;
void solve() {
  int n, fg = 0;
  cin >> n;
  int a[n];
  for (long long i = 0; i < n; i++) cin >> a[i];
  if (a[0] % 2 == 0 || a[n - 1] % 2 == 0)
    cout << "No";
  else {
    if (n % 2 != 0)
      cout << "Yes";
    else {
      cout << "No";
    }
  }
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  solve();
  return 0;
}
