UVA_11364_Parking

#include <stdio.h>
#include <stdlib.h>
#include <limits.h>

int main(int argc, char** argv) {
    int t,n ; /*number of test cases and coordinates*/
    int m;
    int i;/*index of for*/
    int max,min;/*max and min of the inputs*/
    int result; /*result*/
    scanf("%d",&t);
    while(t--){
        min=INT_MAX;
        max=INT_MIN;
        scanf("%d",&n);
        for (i=0;i<n;i++){
            scanf("%d",&m);
            if (m<min) min=m;
            if (m>max) max=m;

        }
        result=(max-min)*2;
        printf("%d\n",result);


    }
    return (EXIT_SUCCESS);
}