Cod sursa(job #369899)
| Utilizator |  Remus Mazilu remus_mazilu |
Data | 29 noiembrie 2009 18:27:04 |
|---|---|---|---|
| Problema | Fractii | Scor | 0 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.34 kb |
#include<fstream.h>
#include<iostream.h>
fstream in("fractii.in",ios::in),out("fractii.out",ios::out);
long cmmdc(long a,long b)
{ while( a!=0 && b!=0)
if(a>b) a%=b;
else b%=a;
if(a==0) return b;
else return a;
}
int main() {
long n, i , j,k=0;
in>>n;
for(i=2;i<=n;i++)
for(j=1;j<=n;j++)
if(cmmdc(i,j)==1) k++;
out<<k;
return 0;
}