Cod sursa(job #279283)
| Utilizator |  Petean Vlad peteanv |
Data | 12 martie 2009 19:13:06 |
|---|---|---|---|
| Problema | Fractii | Scor | 10 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.36 kb |
#include<fstream.h> j
long long j,n,i,s=0;
int cmmdc(int a,int b)
{while(a!=b)
{if(a>b)a-=b;
else b-=a; }
return a;
}
int main()
{
ifstream f("fractii.in");
ofstream g("fractii.out");
while(f>>n)
{
s=2*n-1;
for(i=2;i<=n;i++)
{
for(j=i+1;j<=n;j++)
if(i%j) if(cmmdc(i,j)==1)s+=2;
}
g<<s<<"\n";}
return 0;
}