Cod sursa(job #378643)

Utilizator SpiderManSimoiu Robert SpiderMan Data 29 decembrie 2009 12:26:44
Problema Sum Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.51 kb
#include <stdio.h>
#include <math.h>
long n,x,j,i;
long long sum;
long long v[100005];
void aha()
{
  int i,j;
  for(i=1;i<=100005;i++)
   v[i]=i;
  for(i=2;i<=100005;i++)
  if (v[i]==1)
  {
    j=2*i;
     while (j<=100005)
      {
       v[j]=v[j]-v[i]/i;
       j=j+i;
      }
   }
  }
int main()
{
  aha();
  freopen("sum.in","r",stdin);
  freopen("sum.out","w",stdout);
  scanf("%ld",&n);
  for(i=1;i<=n;i++)
  {
   scanf("%ld",&x);
  sum=v[x]*x*2;
  printf("%lld",sum);
  }
  return 0;
}