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;
template <class T>
bool chmax(T& a, const T& b) {
  if (a < b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T>
bool chmin(T& a, const T& b) {
  if (b < a) {
    a = b;
    return 1;
  }
  return 0;
}
template <typename T>
T argminimal(const function<T(T)>& f, T l, T r) {
  while (r - l > 1) {
    T m = (l + r) / 2;
    if (f(m) - f(m - 1) < 0) {
      l = m;
    } else {
      r = m;
    }
  }
  return l;
}
template <typename T>
T minimal(const function<T(T)>& f, T l, T r) {
  return f(argminimal<T>(f, l, r));
}
template <typename T>
T argmaximal(const function<T(T)>& f, T l, T r) {
  while (r - l > 1) {
    T m = (l + r) / 2;
    if (f(m) - f(m - 1) > 0) {
      l = m;
    } else {
      r = m;
    }
  }
  return l;
}
template <typename T>
T maximal(const function<T(T)>& f, T l, T r) {
  return f(argmaximal<T>(f, l, r));
}
double argminimal(const function<double(double)>& f, double l, double r,
                  int iter = 80) {
  for (int i = 0; i < iter; ++i) {
    double c1 = (l * 2 + r) / 3, c2 = (l + r * 2) / 3;
    if (f(c1) > f(c2)) {
      l = c1;
    } else {
      r = c2;
    }
  }
  return l;
}
double minimal(const function<double(double)>& f, double l, double r,
               int iter = 80) {
  return f(argminimal(f, l, r, iter));
}
double argmaximal(const function<double(double)>& f, double l, double r,
                  int iter = 80) {
  for (int i = 0; i < iter; ++i) {
    double c1 = (l * 2 + r) / 3, c2 = (l + r * 2) / 3;
    if (f(c1) > f(c2)) {
      r = c2;
    } else {
      l = c1;
    }
  }
  return l;
}
double maximul(const function<double(double)>& f, double l, double r,
               int iter = 80) {
  return f(argmaximal(f, l, r, iter));
}
int main() {
  int n, k;
  cin >> n >> k;
  vector<long long> a(n);
  map<int, long long> hist;
  for (int i = 0; i < (int)(n); ++i) {
    scanf("%lld", &a[i]);
    ++hist[a[i]];
  }
  for (auto& p : hist) {
    if (p.second >= k) {
      cout << 0 << endl;
      return 0;
    }
  }
  const long long INF = 1e18;
  auto pushDownCost = [&](long long m) -> long long {
    int c = 0;
    long long res = k - hist[m];
    for (int i = 0; i < (int)(n); ++i) {
      c += (a[i] >= m);
      res += max(a[i] - (m + 1), 0LL);
    }
    return c >= k ? res : INF + m;
  };
  auto pushUpCost = [&](long long m) -> long long {
    int c = 0;
    long long res = k - hist[m];
    for (int i = 0; i < (int)(n); ++i) {
      c += (a[i] <= m);
      res += max(m - 1 - a[i], 0LL);
    }
    return c >= k ? res : INF - m;
  };
  auto sandCost = [&](long long m) -> long long {
    long long res = k - hist[m];
    for (int i = 0; i < (int)(n); ++i) {
      res += max(a[i] - (m + 1), 0LL);
      res += max(m - 1 - a[i], 0LL);
    }
    return res;
  };
  long long ans = 1e18;
  chmin(ans, minimal<long long>(pushDownCost, 0, 1e9 + 1));
  chmin(ans, minimal<long long>(pushUpCost, 0, 1e9 + 1));
  chmin(ans, minimal<long long>(sandCost, 0, 1e9 + 1));
  cout << ans << endl;
  return 0;
}