def solve(n, arr):
    if n % 2 == 0 or arr[0] % 2 == 0 or arr[-1] % 2 == 0:
        return False
    return True

if __name__ == "__main__":
    n = input()
    arr = map(int, raw_input().split())
    if solve(n, arr):
        print 'Yes'
    else:
        print 'No'
