#include <bits/stdc++.h>
using namespace std;
const int maxn = 22;
const long long mod = 1e9 + 7;
const int inf = 0x3f3f3f3f;
int n;
int a[1000];
bool is(int x) { return x & 1; }
int main() {
  if (fopen("/home/lianyi/123.txt", "r") != NULL) {
    freopen("/home/lianyi/123.txt", "r", stdin);
  } else {
    std::ios::sync_with_stdio(false);
    cin.tie(0);
  }
  while (cin >> n) {
    for (int i = 1; i <= n; i++) {
      cin >> a[i];
    }
    int flag = 0;
    if ((a[1] & 1) && (a[n] & 1)) {
      if (n & 1) {
        flag = 1;
      } else {
      }
    }
    if (flag == 1) {
      cout << "Yes\n";
    } else {
      cout << "No\n";
    }
  }
  return 0;
}
