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Cod sursa(job #888530)
#include <iostream>
#include <fstream>
using namespace std;
int n,q,p,d,ok,nr;
int main()
{
ifstream f("fractii.in");
ofstream g("fractii.out");
f>>n;
for(p=1;p<=n;p++)
for(q=1;q<=n;q++)
{
ok=1;
if(p==1)
nr++;
else
{
for(d=2;d<=p;d++)
if(p%d==0)
if(q%d==0) ok=0;
if(ok) nr++;
}
}
g<<nr;
f.close();
g.close();
return 0;
}