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())
a=list(map(int,input().split()))
a.sort()
 
c=list(set(a))
 
b=[[] for i in range(2*100000+1)]
 
for i in a:
    temp=i;j=0
    b[temp].append(0)
 
    if temp!=1:
        while(1):
            temp=temp//2
            j+=1
            b[temp].append(j)
            if temp==1:
                break
 
res=2*1000000000000000    
for i in range(1,max(a)+1):
    if len(b[i])>=m:
        temp=sum(b[i][:m])
        res=min(res,temp)
print(res)