n = int(input())
num = list(map(int,input().split()))
max_n,min_n = num[0],num[0]
step = [[-1,1]]

def measure(index,limit):
    cost = 0
    for i in range(n):
        cost += abs(num[i]-index)
        if cost>limit:
            return float("inf")
    return cost

for i in range(n):
    if max_n<num[i]:
        max_n=num[i]
    elif min_n>num[i]:
        min_n=num[i]

x = 2
while x<max_n-min_n:
    step.insert(0,[-x,x])
    x *= 2

index = (max_n+min_n)//2
cost = measure(index,float("inf"))
for s in step:
    for i in s:
        c = measure(index+i,cost)
        if cost>c:
            index += i
            cost = c
            break

print(cost)