#include<fstream>
#include<cmath>
using namespace std;
ifstream f("inundatii.in");
ofstream g("inundatii.out");
int n,i,nr,x[50001],y[50001],z[50001];
unsigned long long s;
int main()
{f>>n;
s=0;
for(i=1;i<=n;++i)
	f>>x[i]>>y[i]>>z[i];
nr=x[n/2]-n/2;
for(i=1;i<=n;++i)
	s+=abs(x[i]-nr++);

nr=y[n/2]-n/2;
for(i=1;i<=n;++i)
	s+=abs(y[i]-nr++);
nr=z[n/2]-n/2;
for(i=1;i<=n;++i)
	s+=abs(z[i]-nr++);

g<<(unsigned long long)s<<'\n';
return 0;
}