oks 66 I (17)

#include<iostream>
#include<math.h>
using namespace std;
struct point
{
 int x, y, z;
};

double dlina(point a, point b)
{
 return sqrt(pow(a.x-b.x, 2)+ pow(a.y-b.y, 2)+pow(a.z-b.z,2));
}

int main()
{
 double s=0, o=0;
 int n;
 point a[10], p1, p2,p3;
 cin>>n;
 for(int i=0;i<n;++i)
 {
  cin>>a[i].x>>a[i].y>>a[i].z;
 }
 for(int i=0;i<n-2;++i)
 {
  for(int j=i+1;j<n-1;++j)
  {
   for(int k=j+1;k<n;++k)
   {
          o=dlina(a[i],a[j])+dlina(a[j],a[k])+dlina(a[k],a[i]);
    if(o>s)
    {
     s=o;
     p1=a[i];
     p2=a[j];
     p3=a[k];
    }
   }
  }
 }
 cout<<s<<endl;
 cout<<p1.x<<' '<<p1.y<<' '<<p1.z<<endl;
 cout<<p2.x<<' '<<p2.y<<' '<<p2.z<<endl;
 cout<<p3.x<<' '<<p3.y<<' '<<p3.z<<endl;
 cout<<endl;
 system("pause");
 return 0;
}