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Cod sursa(job #243738)
/*
Nume:Temian
Date:
Problema:
*/
#include <iostream>
#include <fstream>
using namespace std;
int main()
{
ifstream fin("fractii.in");
ofstream fout("fractii.out");
unsigned long int q,i,n,c=0,j,b;
fin>>n;
fin.close();
for(i=1;i<=n;i++)
{
for(q=1;q<=n;q++)
{
b=0;
for(j=2;j<=i/2;j++)
if(i%j==0&&q%j==0){b=1;break;}
if(b==0)c++;
}
}
c-=(n-1);
fout<<c;
fout.close();
system ("pause");
return 1;
}