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