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Cod sursa(job #847741)
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int main()
{
int a,i,j,c;
c=0;
f>>a;
for(i=1;i<=a;i++)
{
for(j=1;j<=a;j++)
{
while(i!=j)
{
if(i>=j) i=i-j;
else j=j-i;
}
if(i==1) c++;
}
}
g<<c;
f.close();
g.close();
return 0;
}