Cod sursa(job #29359)
| Utilizator |  Andrei Grigoras andreigrig |
Data | 9 martie 2007 09:27:06 |
|---|---|---|---|
| Problema | Fractii | Scor | 10 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.34 kb |
#include <fstream.h>
long cmmdc(long a, long b)
{
if(a==b)return a;
else if(a>b) return cmmdc(a-b,b);
else return cmmdc(a,b-a);
}
int main()
{long n,S=0,i,j;
ifstream f("fractii.in");
ofstream g("fractii.out");
f>>n;
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
if(cmmdc(i,j)==1) S++;
g<<S;
g.close();
f.close();
return 0;
}