#include <bits/stdc++.h>
using namespace std;
int n;
int a[105];
int main() {
  int i;
  while (scanf("%d", &n) != EOF) {
    for (i = 1; i <= n; i++) scanf("%d", &a[i]);
    if (n % 2 == 0)
      printf("No\n");
    else if ((a[1] % 2) && (a[n] % 2))
      printf("Yes\n");
    else
      printf("No\n");
  }
  return 0;
}
