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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("fractii.in");
ofstream fout("fractii.out");
int main()
{
int k=1,n,c,d;
fin>>n;
int m=n*n;
float v[n*n],i,j;
v[n*n]=(0);
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
{v[k]=float(i/j);
k++;
}
for(k=1;k<=m;k++)
{
for(i=k+1;i<m;i++)
{c=i;
if(v[c]==v[k])
{for(j=i;j<=m;j++)
{d=j;
v[d]=v[d+1];
}
m--;
}
}
i--;
}
m--;
fout<<m;
}