Cod sursa(job #352271)

Utilizator matzipanAndrei matzipan Data 30 septembrie 2009 22:39:21
Problema Fractii Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.29 kb
Raporteaza aceasta sursa 
#include <fstream>
using  namespace std;
ifstream in("fractii.in");
ofstream out("fractii.out");
long N,i,x,nr;
long era() {
	unsigned int nr;
	nr=N;
	for(x=2; x*i<=N; x++) nr--;
	return nr;
}
int main() {
	in>>N;
	nr=0;
	for(i=2;i<=N;i++)
		nr+=era();
	out<<nr;
	return 0;
}