POJ2140

#include<iostream>
#include<cmath>
using namespace std;
double Q(double m,double n)
{
	double q=0.5-(m/2)+(n/m);
	return q;
}
int main()
{
	double N=0;
	int y;
	cin>>y;
	int A=0;
	for(int x=1;x<y;++x){
		N=Q(x,y);
		if((N>=1)&&(N==(int)N))
			++A;
		else continue;
	}
	cout<<A<<endl;
	return 0;
}