Cod sursa(job #610113)

Utilizator StefanelStefanel Roscan Stefanel Data 24 august 2011 22:52:08
Problema Fractii Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.3 kb
Raporteaza aceasta sursa 
#include<iostream>
using namespace std;

int cmmdc(int a, int b)
{
	if (a==b) return a;
	if (a>b) return cmmdc(a-b,b);
	else return cmmdc(a,b-a);
}

int main()
{
	int n,f=0,i,j;
	cin>>n;
	f=2*n-1;
	for(i=2; i<=n; i++)
		for(j=2; j<=n; j++)
			if (cmmdc(i,j)==1) f++;
	cout<<f;
	return 0;
}