#include <algorithm>
using namespace std;

#define INF 0x3f3f3f3f
#define DIM 50005

struct punct {int x,y,z;} v[DIM];
int bst[DIM],bdr[DIM];
int n,nrt=INF;

void read ()
{
    int i;

    scanf ("%d",&n);
    for (i=1; i<=n; ++i)
        scanf ("%d%d%d",&v[i].x,&v[i].y,&v[i].z);
}

void solve ()
{
    int i;

    for (i=2; i<=n; ++i)
        bst[i]=bst[i-1]+(i-1)*(abs (v[i-1].x-v[i].x)+abs (v[i-1].y-v[i].y)+abs (v[i-1].z-v[i].z)+3);
    for (i=n-1; i>0; --i)
        bdr[i]=bdr[i+1]+(n-i)*(abs (v[i+1].x-v[i].x)+abs (v[i+1].y-v[i].y)+abs (v[i+1].z-v[i].z)+3);
    nrt=INF;
    for (i=1; i<=n; ++i)
        if (bst[i]+bdr[i]<nrt)
            nrt=bst[i]+bdr[i];
    printf ("%d",nrt);
}

int main ()
{
    freopen ("inundatii.in","r",stdin);
    freopen ("inundatii.out","w",stdout);

    read ();
    solve ();

    return 0;
}