Cod sursa(job #1425591)

Utilizator mihaistanusoiuStanusoiu Mihai mihaistanusoiu Data 27 aprilie 2015 19:09:32
Problema Fractii Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.28 kb
Raporteaza aceasta sursa 
#include<iostream>
#include<fstream>
using namespace std;
ifstream f("fractii.in");
ofstream g("fractii.out");
int n,sol,i,k,j;

int main ()
{
	f>>n;
	sol=2*n-1;
	for(i=2;i<n;i++)
	{
		k=0;
		for(j=i+i;j<=n;j+=i)
			k++;
		sol+=(n-i-k)*2;
	}
	g<<sol;
	return 0;
}