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;}