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#include <iostream>
#include <fstream>
using namespace std;
int main()
{
ifstream g("fractii.in");
ofstream f("fractii.out");
double Vn[100],V[100];
int i,j,x,n,k=0,nr=0;
double vrez[1000];
g>>n;
for(i=0;i<n;i++){
Vn[i]=i+1;
V[i]=i+1;}
for(i=0;i<n;i++)
for(j=0;j<n;j++){
vrez[k]=Vn[i]/V[j];
k++;
}
nr=k;
for(i=0;i<k-1;i++)
for(j=i+1;j<k;j++)
if(vrez[i]==vrez[j]){
for(x=j;x<k;x++)
vrez[x]=vrez[x+1];
k--;}
f<<k;
}