#include<iostream>
#define int long
using namespace std;
int L,ans;
int gcd(int a,int b){return b?gcd(b,a%b):a;}
main()
{
	cin>>L;
	L/=4;
	for(int n=1;2*n<=L;n++)for(int m=1;m<n&&2*n*(n+m)<=L;m++)
	{
		ans+=n+m&1&&gcd(n-m,2*n*m)==1;
	}
	cout<<ans<<endl;
}