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Cod sursa(job #532615)
#include<iostream>
#include<math.h>
#include<fstream>
using namespace std;
ifstream in("fractii.in");
ofstream out("fractii.out");
int main (void)
{
int n,j,i,k,min,max;
in>>n;
k=0;
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
{
if(i==1&&i!=j||j==1)
k++;
if(i<j)
{min=i;
max=j;}
else
{min=j;
max=i;}
if(max%min!=0)
k++;
}
out<<k;
return 0;
}