Cod sursa(job #315454)
Utilizator | sotoc sergiu rathegod | Data | 15 mai 2009 17:45:53 |
---|---|---|---|
Problema | Fractii | Scor | 10 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.38 kb |
#include<fstream.h>
int cmmdc(int i,int j)
{
if(i==j) return i;
else
if(i>j) return cmmdc(i-j,j);
else return cmmdc(i,j-i);
}
int main()
{
ifstream f("fractii.in");
ofstream g("fractii.out");
int n,sem;
long s=0;
f>>n;
s=n;
f.close();
for(int i=2;i<=n;i++)
for(int j=2;j<=n;j++)
{
if(cmmdc(i,j)==1) s++;
}
g<<s+n-1;
g.close();
return 0;
}