#include <bits/stdc++.h>
using namespace std;
int main(void) {
  int n;
  int arr[110];
  scanf("%d", &n);
  for (int i = 0; i < n; ++i) scanf("%d", &arr[i]);
  if (n % 2 == 0)
    printf("No\n");
  else {
    if (arr[0] % 2 == 1 && arr[n - 1] % 2 == 1) {
      printf("Yes\n");
    } else
      printf("No\n");
  }
  return 0;
}
