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#include <bits/stdc++.h>
using namespace std;
int v,w,vw;
struct cl{
int x,y,z;
} A[100000];
int main(){
ifstream cin("inundatii.in");
ofstream cout("inundatii.out");
int N;
long long rez=0;
cin>>N;
for(int i=1;i<=N;i++){
cin>>A[i].x>>A[i].y>>A[i].z;
v=A[(N+1)/2].x-N/2;
w=A[(N-1)/2].y-N/2;
vw=A[(N-1)/2].z-N/2;
}
for(int i=1;i<=N;i++){
rez+=1ll*abs(A[i].x-v)+1ll*abs(A[i].y-w)+1ll*abs(A[i].z-vw);
v++,w++,vw++;
}
cout<<rez;
return 0;
}