#include <stdio.h>

#define nmax 50111
#define FOR(i,s,d) for(i=(s);i<(d);++i)

typedef long long lint;

int n,A[3][nmax];
lint sol;

int mod(int a) { return a>0?a:-a; }

int main()
{
	freopen("inundatii.in","r",stdin);
	freopen("inundatii.out","w",stdout);
	int i,j,a;
	scanf("%d",&n);
	FOR(i,0,n) FOR(j,0,3)
		scanf("%d",&A[j][i]);
	FOR(j,0,3)
	{
		a=A[j][n/2]-n/2;
		FOR(i,0,n)
			sol+=mod(a+i-A[j][i]);
	}
	printf("%lld\n",sol);
	return 0;
}