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Cod sursa(job #374243)
#include<fstream.h>
\
int main()
{
ifstream f("fractii.in");
ofstream g("fractii.out");
long n,i,j,k;
int c=0;
f>>n;
f.close();
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
{
if(i>j)k=i;
else k=j;int g=0,b=k;
for(int x=2;x<=k;x++)
if(i%x!=0 || j%x!=0)g++;
else break;
if(g==b-1)c++;
}
g<<c<<'\n';
g.close();
return 0;
}