Cod sursa(job #762015)

Utilizator misinozzz zzz misino Data 28 iunie 2012 12:24:10
Problema Sum Scor 70
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.31 kb
Raporteaza aceasta sursa 
#include<fstream>
using namespace std;
ifstream f("sum.in");
ofstream g("sum.out");
int i,j,n,y,e[100005];
int main()
{f>>n;
for(i=2;i<=100002;++i)
	e[i]=i;
for(i=2;i<=100002;++i)
	if(e[i]==i)
		for(j=i;j<=100002;j+=i)
			e[j]=e[j]/i*(i-1);
for(i=1;i<=n;++i)
{f>>y;
g<<e[y]*2*y<<'\n';
}
return 0;
}