#include <fstream>

using namespace std;

ifstream fin("inundatii.in");
ofstream fout("inundatii.out");

const int nmax= 50000;

int v[nmax+1][3];

int solve( int n, int k ) {
    int sol= 0;
    for ( int i= 1; i<=n; ++i ) {
        sol= sol+max((n+1)/2-i, i-(n+1)/2)+max(v[(n+1)/2][k]-v[i][k], v[i][k]-v[(n+1)/2][k]);
    }

    return sol;
}

int main(  ) {
    int n;
    fin>>n;
    for ( int i= 1; i<=n; ++i ) {
        fin>>v[i][0]>>v[i][1]>>v[i][2];
    }

    int sol= solve(n, 0)+solve(n, 1)+solve(n, 2);
    fout<<sol<<"\n";

    return 0;
}