#include <stdio.h>

const double inf = 1e250;
struct score
{
    double x1, x2, x3, x4, x5;
    double ans[16];
}a[100005];

void slove(int i, double x1, double x2, double x3, double x4, double x5)
{
    a[i].ans[0] = x1 + x2 + x3 + x4 + x5;
    a[i].ans[1] = -x1 + x2 + x3 + x4 + x5;
    a[i].ans[2] = x1 - x2 + x3 + x4 + x5;
    a[i].ans[3] = x1 + x2 - x3 + x4 + x5;
    a[i].ans[4] = x1 + x2 + x3 - x4 + x5;
    a[i].ans[5] = x1 + x3 + x3 + x4 - x5;
    a[i].ans[6] = -x1 - x2 +x3 + x4 + x5;
    a[i].ans[7] = -x1 + x2 - x3 + x4 + x5;
    a[i].ans[8] = -x1 + x2 + x3 - x4 + x5;
    a[i].ans[9] = -x1 + x2 + x3 + x4 - x5;
    a[i].ans[10] = x1 - x2 - x3 + x4 + x5;
    a[i].ans[11] = x1 - x2 + x3 - x4 + x5;
    a[i].ans[12] = x1 - x2 + x3 + x4 - x5;
    a[i].ans[13] = x1 + x2 - x3 - x4 + x5;
    a[i].ans[14] = x1 + x2 - x3 + x4 - x5;
    a[i].ans[15] = x1 + x2 + x3 - x4 - x5;    
}

int main()
{
    int n, i, j;
    double maxans, maxx, minx, tmp;
    while(scanf("%d", &n) != EOF && n){
        for(i = 1;i <= n;i++){
            scanf("%lf%lf%lf%lf%lf", &a[i].x1, &a[i].x2, &a[i].x3,
               &a[i].x4, &a[i].x5);
            slove(i, a[i].x1, a[i].x2, a[i].x3, a[i].x4, a[i].x5);
        }
        maxans = -inf;
        for(i = 0;i <= 15;i++){
            maxx = -inf;
            minx = inf;
            for(j = 1;j <= n;j++){
                if(a[j].ans[i] < minx) minx = a[j].ans[i];
                if(a[j].ans[i] > maxx) maxx = a[j].ans[i];      
            }
            tmp = maxx - minx;
            if(tmp > maxans) maxans = tmp;
        }
        printf("%.2lf\n", maxans);     
    }
    return 0;
}