题库练习 Funky Numbers
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A8657 | Funky Numbers

时间限制1s
内存限制256MB
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题目描述

As you very well know, this year's funkiest numbers are so called triangular numbers (that is, integers that are representable as ![](/uploads/acgo/image/b4f78de2757535a3_cb07fdae3063.jpeg), where $k$ is some positive integer), and the coolest numbers are those that are representable as a sum of two triangular numbers.

A well-known hipster Andrew adores everything funky and cool but unfortunately, he isn't good at maths. Given number $n$ , help him define whether this number can be represented by a sum of two triangular numbers (not necessarily different)!

输入格式

The first input line contains an integer $n$ ( $1<=n<=10^{9})$ .

输出格式

Print "YES" (without the quotes), if $n$ can be represented as a sum of two triangular numbers, otherwise print "NO" (without the quotes).

输入输出样例

输入 #1
256
输出 #1
YES
输入 #2
512
输出 #2
NO
C++ 编辑器
输入
输出