Cod sursa(job #1334955)

Utilizator TimoteiCopaciu Timotei Timotei Data 4 februarie 2015 20:11:39
Problema Sum Scor 40
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.42 kb
#include <iostream>
#include <fstream>
using namespace std;
int n,i,x,k,j,s;
bool u[10000001];
int main()
{
   ifstream f("sum.in");
   ofstream g("sum.out");
  f>>n;
  for(i=1;i<=n;i++)
  {
      f>>x;s=0;
      for(j=1;j<=x*2;j++)u[j]=true;
      for(j=2;j<=x;j++)if((x%j==0)&&(u[j]==true))for(k=1;k<=2*x/j;k++)u[k*j]=false;
      for(j=1;j<2*x;j++)if(u[j]==true)s=s+j;
      g<<s<<endl;
  }
    return 0;
}