Power Sequence

1000ms

262144K

Description:

Let's call a list of positive integers $$$a_0, a_1, ..., a_{n-1}$$$ a power sequence if there is a positive integer $$$c$$$, so that for every $$$0 \le i \le n-1$$$ then $$$a_i = c^i$$$.

Given a list of $$$n$$$ positive integers $$$a_0, a_1, ..., a_{n-1}$$$, you are allowed to:

Reorder the list (i.e. pick a permutation $$$p$$$ of $$$\{0,1,...,n - 1\}$$$ and change $$$a_i$$$ to $$$a_{p_i}$$$), then
Do the following operation any number of times: pick an index $$$i$$$ and change $$$a_i$$$ to $$$a_i - 1$$$ or $$$a_i + 1$$$ (i.e. increment or decrement $$$a_i$$$ by $$$1$$$) with a cost of $$$1$$$.

Find the minimum cost to transform $$$a_0, a_1, ..., a_{n-1}$$$ into a power sequence.

Input:

The first line contains an integer $$$n$$$ ($$$3 \le n \le 10^5$$$).

The second line contains $$$n$$$ integers $$$a_0, a_1, ..., a_{n-1}$$$ ($$$1 \le a_i \le 10^9$$$).

Output:

Print the minimum cost to transform $$$a_0, a_1, ..., a_{n-1}$$$ into a power sequence.

Sample Input:

3
1 3 2

Sample Output:

Sample Input:

3
1000000000 1000000000 1000000000

Sample Output:

1999982505

Note:

In the first example, we first reorder $$$\{1, 3, 2\}$$$ into $$$\{1, 2, 3\}$$$, then increment $$$a_2$$$ to $$$4$$$ with cost $$$1$$$ to get a power sequence $$$\{1, 2, 4\}$$$.

Informação

Provedor Codeforces

Código CF1397B