|시간 제한||메모리 제한||제출||정답||맞은 사람||정답 비율|
|2 초||512 MB||14||6||4||36.364%|
A positive integer k is called a jimp number if there is exactly one triple of positive integers (a, b, c) such that a, b, and c are consecutive terms of an arithmetic progression (exactly in that order) and a2 + b2 + k = c2.
Count the jimp numbers which are not greater than the given number n.
The only line contains a single integer n (1 ≤ n ≤ 1011).
Print a single integer: the answer to the problem.