//#pragma GCC optimize(2)
//#pragma GCC optimize(3,"Ofast","inline")
#include <bits/stdc++.h>

#define FOR(i, j, k) for(int i = (j);i <= (k);i ++)
#define ROF(i, j, k) for(int i = (j);i >= (k);i --)
#define For(i, j, k) for(int i = (j);i < (k);i ++)
#define Rof(i, j, k) for(int i = (j);i > (k);i --)
#define ull unsigned long long
#define int long long
#define PII pair<int,int>
#define ULL unsigned long long
#define db double
#define x first
#define y second
#define sp(x) fixed << setprecision(x)
#define all(x) x.begin(), x.end()
#define unq_all(x) x.erase(unique(all(x)), x.end())
#define M(x) x %= mod, x += mod, x %= mod
#define YES cout << "YES\n"
#define NO cout << "NO\n"
#define Yes cout << "Yes\n"
#define No cout << "No\n"
#define ANS cout << ans << '\n'
#define de(p) cout << #p << ' ' << p << '\n'
#define END(i, n) (i == n ? '\n' : ' ')
#define double long double

#define RED cout << "\033[91m"
#define GREEN cout << "\033[92m"
#define YELLOW cout << "\033[93m"
#define BLUE cout << "\033[94m"
#define MAGENTA cout << "\033[95m"
#define CYAN cout << "\033[96m"
#define RESET cout << "\033[0m"

// 红色
#define DEBUG1(x)                     \
    RED;                              \
    cout << #x << " : " << x << endl; \
    RESET;

// 绿色
#define DEBUG2(x)                     \
    GREEN;                            \
    cout << #x << " : " << x << endl; \
    RESET;

// 蓝色
#define DEBUG3(x)                     \
    BLUE;                             \
    cout << #x << " : " << x << endl; \
    RESET;

// 品红
#define DEBUG4(x)                     \
    MAGENTA;                          \
    cout << #x << " : " << x << endl; \
    RESET;

// 青色
#define DEBUG5(x)                     \
    CYAN;                             \
    cout << #x << " : " << x << endl; \
    RESET;

// 黄色
#define DEBUG6(x)                     \
    YELLOW;                           \
    cout << #x << " : " << x << endl; \
    RESET;


using namespace std;


const int N = 5e5 + 10, M = 1e5 + 10, INF = 1e9, mod = 998244353;

int n, m, k;
int a[N];

int cal(int x, int y) //y->x
{
    int now = 0,res = 1e18;
    while (1)
    {
        if (y == 0) break;
        res = min(res,abs(y - x) + now);
        y /= 2;
        now ++;
    }
    return res;
}

int get(int x)
{
    priority_queue<int,vector<int>,greater<>> q;
    FOR(i,1,n)
    {
        q.push(cal(x,a[i]));
    }
    int res = 0;
    FOR(i,1,n - m)
    {
        res += q.top();
        q.pop();
    }
    return res;
}


void solve()
{
    cin >> n >> m;
    set<int> se;
    FOR(i,1,n)
    {
        cin >> a[i];
        int t = a[i];
        while (t)
        {
            se.insert(t);
            t >>= 1;
        }
    }
    se.insert(0);
    set<int> see;
    for(auto i : se)
    {
        FOR(j,-15,15)
        {
            if (i + j >= 0)
            {
                see.insert(i + j);
            }
        }
    }
    int ans = 1e9;
    for(auto i : see)
    {
        ans = min(ans,get(i));
    }
    ANS;
}

signed main()
{
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    auto t = clock();
    int T = 1;
    cin >> T;

    while (T--)
    {
        solve();
    }
    auto tt = clock();

//    cout << "Time: " << 1000.0 * (tt - t) / CLOCKS_PER_SEC << "ms" << endl;

    return 0;
}