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 PYTHON3):

Solution:
n, m = map(int, input().split())
data = list(map(int, input().split()))
data.sort()
last = -120
CONST = 2 * 10 ** 5 + 1
ans = 10 ** 15
for i in range(CONST):
    c, kol = 0, 0
    if data[-1] < i:
        break
    for j in data:
        if kol == m:
            ans = min(ans, c)
            break
        if j > i:
            k = 0
            t = j
            while t > i:
                t //= 2
                k += 1
            if t == i:
                c += k
                kol += 1
        elif j == i:
            kol += 1
    if kol == m:
        ans = min(ans, c)
print(ans)