Cod sursa(job #275380)
| Utilizator |  Rosca Valentin valentinrosca |
Data | 10 martie 2009 13:45:01 |
|---|---|---|---|
| Problema | Fractii | Scor | 0 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.34 kb |
#include<fstream.h>
#include<math.h>
ifstream fin("fractii.in");
ofstream fout("fractii.out");
long n,i,j,s,ci,cj,r;
int main()
{
fin>>n;
for(i=1;i<=n;i++)
{
for(j=1;j<n;j++)
{
ci=i;
cj=j;
do
{
r=cj%ci;
cj=ci;
ci=r;
}
while(r);
if(cj==1)
s=s+2;
}
}
fout<<s;
return 0;
}