Cod sursa(job #756462)

Utilizator paul777Astalas Paul paul777 Data 9 iunie 2012 17:44:32
Problema Sum Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.36 kb
#include<fstream>
using namespace std;

int main()
{
	ifstream f("sum.in");
	ofstream g("sum.out");
	long long v[100010],x[100010],i,j,n,l;f >> n;
	for(i=1;i<=100010;i++)v[i]=i;
	for(i=1;i<=100010;i++)
		if(v[i]==i)
			for(j=i;j<=100010;j+=i)v[j]=v[j]/i*(i-1);
	for(l=1;l<=n;l++) {f >> x[l];g << v[x[l]]*2*x[l];}
			f.close();g.close();
	return 0;
}