Cod sursa(job #283780)

Utilizator xbladeIagar Robert xblade Data 19 martie 2009 19:36:56
Problema Fractii Scor 10
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.3 kb
Raporteaza aceasta sursa 
#include<fstream.h>
ifstream in("fractii.in");
ofstream out("fractii.out");
long long n;
int gcd(int a, int b)
{
	if (!b) 
		return a;
	return gcd(b, a % b);  
}
int main()
{
	in>>n;
	long c=0,i,j;
	for(i=1;i<=n;i++)
		for(j=1;j<=n;j++)
			if(gcd(i,j)==1)
				c++;
	out<<c;
	return 0;
}