# include <cstdlib>
# include <iostream>
using namespace std;

int main ( int argc, char *argv[] )
{
  int i, j, total;
  int n = 1000;
  bool prime;

  total = 0;
  for ( i = 2; i <= n; i++ )
  {
    prime = true;

    for ( j = 2; j < i; j++ )
    {
      if ( i % j == 0 )
      {
        prime = false;
        break;
      }
    }
    if ( prime )
    {
      total = total + i;
    }
  }
  cout << "PRIME_SUM(2:" << n << ") = " << total << "\n";
  return 0;
}