Cod sursa(job #756555)

Utilizator paul777Astalas Paul paul777 Data 9 iunie 2012 21:16:00
Problema Sum Scor 85
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.33 kb
Raporteaza aceasta sursa 
#include <fstream>
using namespace std; 

int main()
{
ifstream f("sum.in");
ofstream g("sum.out");
long long n,x,v[100001],i,j,a;
f>>n;
for(i=1;i<100001;i++)
v[i]=i-1;
for(i=2;i<100001;i++)
for(j=2*i;j<100001;j=j+i)
v[j]=v[j]-v[i];
for(i=1;i<=n;i++)
{f>>x;
long long a=2*(long long)x*v[x];
g<<a<<"\n";}
return 0;
}