If a positive integer can be expressed as the square difference of two positive integers, this number is called a "smart number", such as 16=5**2-3**2, 16 is a "smart number", then 2014, 2015 , 2016, 2017 these four numbers, how many are not "wisdom numbers"
一个正整数若能表示为两个正整数的平方差，则称这个数为"智慧数"，比如16=5**2-3**2，16就是一个"智慧数"，那么2014、2015、2016、2017这四个数中，多少不是"智慧数"
<result>2_014</result>