#include <bits/stdc++.h>
using namespace std;
int a[502];
int main()
{
int i,j,t,n,sum;
cin>>t;
while(t--)
{
cin>>n;
for(i=0;i<n;i++)
{
scanf("%d",&a[i]);
}
sort(a,a+n);
int v = a[n / 2];
sum = 0;
for (int j = 0; j < n; j++) {
sum += abs(v - a[j]);
}
cout<<sum<<endl;
}
return 0;
}
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