#include <cstdio>
#include <algorithm>
#include <math.h>
#define DIM 52000
using namespace std;
int N, sum; long long val;
int X1[DIM], Y1[DIM], Z1[DIM];
int X2[DIM], Y2[DIM], Z2[DIM];
int main ()
{
freopen ("inundatii.in" ,"r", stdin );
freopen ("inundatii.out","w", stdout);
scanf ("%d", &N);
for (int i = 1; i <= N; i ++)
{
scanf ("%d", &X1[i]);
scanf ("%d", &Y1[i]);
scanf ("%d", &Z1[i]);
X1[i] -= i;
Y1[i] -= i;
Z1[i] -= i;
}
/***********************************/
sum = 0;
for (int i = 1; i <= N; i ++)
sum += X1[i];
sum = round(sum * 1.0 / N);
for (int i = 1; i <= N; i ++)
X2[i] = sum + i;
for (int i = 1; i <= N; i ++)
val += abs (X1[i] + i - X2[i]);
/***********************************/
sum = 0;
for (int i = 1; i <= N; i ++)
sum += Y1[i];
sum = round(sum * 1.0 / N);
for (int i = 1; i <= N; i ++)
Y2[i] = sum + i;
for (int i = 1; i <= N; i ++)
val += abs (Y1[i] + i - Y2[i]);
/***********************************/
sum = 0;
for (int i = 1; i <= N; i ++)
sum += Z1[i];
sum = round(sum * 1.0 / N);
for (int i = 1; i <= N; i ++)
Z2[i] = sum + i;
for (int i = 1; i <= N; i ++)
val += abs (Z1[i] + i - Z2[i]);
/***********************************/
printf ("%lld\n", val);
fclose (stdin );
fclose (stdout);
return 0;
}