Problem: You are given the array a consisting of n elements and the integer k ≤ n.

You want to obtain at least k equal elements in the array a. In one move, you can make one of the following two operations:

  * Take one of the minimum elements of the array and increase its value by one (more formally, if the minimum value of a is mn then you choose such index i that a_i = mn and set a_i := a_i + 1); 
  * take one of the maximum elements of the array and decrease its value by one (more formally, if the maximum value of a is mx then you choose such index i that a_i = mx and set a_i := a_i - 1). 



Your task is to calculate the minimum number of moves required to obtain at least k equal elements in the array.

Input

The first line of the input contains two integers n and k (1 ≤ k ≤ n ≤ 2 ⋅ 10^5) — the number of elements in a and the required number of equal elements.

The second line of the input contains n integers a_1, a_2, ..., a_n (1 ≤ a_i ≤ 10^9), where a_i is the i-th element of a.

Output

Print one integer — the minimum number of moves required to obtain at least k equal elements in the array.

Examples

Input


6 5
1 2 2 4 2 3


Output


3


Input


7 5
3 3 2 1 1 1 3


Output


4

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
const int N = 50000 + 50;
const int INF = int(1e9) + 100;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  ;
  long long n, k;
  cin >> n >> k;
  long long a[n], i, j;
  for (i = 0; i < n; i++) cin >> a[i];
  map<long long, vector<long long>> m;
  vector<long long> v;
  long long c, val, ans = INT_MAX;
  for (i = 0; i < n; i++) {
    c = 0;
    while (a[i] != 0) {
      m[a[i]].push_back(c);
      c++;
      a[i] = a[i] / 2;
    }
  }
  for (i = 0; i <= 200000; i++) {
    vector<long long> v = m[i];
    sort(v.begin(), v.end());
    val = 0;
    if (v.size() >= k) {
      for (j = 0; j < k; j++) val += v[j];
      ans = min(ans, val);
    }
  }
  cout << ans << endl;
  return 0;
}