#include<cstdio>
#include<cstdlib>
long a[4][50000],n,i,rez,media,k;
int main(){
	freopen("inundatii.in","r",stdin);
	freopen("inundatii.out","w",stdout);
	scanf("%ld",&n);
	for(i=0;i<n;i++)
		scanf("%ld%ld%ld",&a[1][i],&a[2][i],&a[3][i]);
	rez=0;
	for(k=1;k<=3;k++){
		media=0;
		for(i=0;i<n;i++)
			media+=a[k][i];
		media/=n;
		for(i=0;i<n;i++)
			rez+=abs(a[k][i]-(media+i));
	}
	printf("%ld\n",rez);
	fclose(stdin);
	fclose(stdout);
	return 0;
}