main.c

#include <stdio.h>

int abs(int value) {
    if (value < 0)
        return value * -1;
    else
        return value;
}

int even(int value) {
    if (value % 2 == 0)
        return 1;
    
    return 0;
}

int median(int s[], int n) {
    if (even(n))
    {
        return (s[(n / 2) - 1] + s[(n / 2)]) / 2;
    }
    else
    {
        return s[(n / 2)];
    }
}

int main()
{
    int n;
    scanf("%d", &n);

    int d[n];

    int i = 0;
    while (i < n)
    {
        int m;
        scanf("%d", &m);

        int s[m];

        int j = 0;
        while (j < m)
        {
            scanf("%d", &s[j]);

            j++;
        }

        d[i] = 0;

        j = 0;
        while (j < m)
        {
            d[i] += abs(s[j] - median(s, m));

            j++;
        }

        i++;
    }

    i = 0;
    while (i < n)
    {
        printf("%d\n", d[i]);
        i++;
    }
}