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Cod sursa(job #208988)
#include<stdio.h>
int main()
{long nufunctie,n,i,min,j,k,nrf;
freopen("fractii.in","r",stdin);
freopen("fractii.out","w",stdout);
scanf("%lld",&n);
nrf=0;
for(i=1;i<=n;i++)
for (j=1;j<=n;j++)
{nufunctie=0;
for (k=2;k<=n;k++)
if (i%k==0&& j%k==0) nufunctie=1;
if (nufunctie==0) nrf=nrf+1;
}
printf("%lld\n",nrf);
}