#yuki837
import sys

n=int(raw_input())
y=map(int,raw_input().split())
y.sort()
if y[0]==y[n-1]:
 print 1
 sys.exit()
d=[0]*100000
temp=0
for i in xrange(n-1):
 temp+=y[i]-y[i/2]
 d[i]+=temp
temp=0
for i in xrange(n-2,-1,-1):
 temp+=y[n-(n-i)/2]-y[i+1]
 d[i]+=temp
m=1<<18
for i in xrange(n-1):
 m=min(m,d[i])
print m