# 1558. Minimum Numbers of Function Calls to Make Target Array

https://leetcode.com/problems/minimum-numbers-of-function-calls-to-make-target-array

## Description

![](https://assets.leetcode.com/uploads/2020/07/10/sample_2_1887.png)

Your task is to form an integer array `nums` from an initial array of zeros `arr` that is the same size as `nums`.

Return the minimum number of function calls to make `nums` from `arr`.

The answer is guaranteed to fit in a 32-bit signed integer.

**Example 1:**

```
**Input:** nums = [1,5]
**Output:** 5
**Explanation:** Increment by 1 (second element): [0, 0] to get [0, 1] (1 operation).
Double all the elements: [0, 1] -> [0, 2] -> [0, 4] (2 operations).
Increment by 1 (both elements)  [0, 4] -> [1, 4] -> **[1, 5]** (2 operations).
Total of operations: 1 + 2 + 2 = 5.
```

**Example 2:**

```
**Input:** nums = [2,2]
**Output:** 3
**Explanation:** Increment by 1 (both elements) [0, 0] -> [0, 1] -> [1, 1] (2 operations).
Double all the elements: [1, 1] -> **[2, 2]** (1 operation).
Total of operations: 2 + 1 = 3.
```

**Example 3:**

```
**Input:** nums = [4,2,5]
**Output:** 6
**Explanation:** (initial)[0,0,0] -> [1,0,0] -> [1,0,1] -> [2,0,2] -> [2,1,2] -> [4,2,4] -> **[4,2,5]**(nums).
```

**Example 4:**

```
**Input:** nums = [3,2,2,4]
**Output:** 7
```

**Example 5:**

```
**Input:** nums = [2,4,8,16]
**Output:** 8
```

**Constraints:**

* `1 <= nums.length <= 10^5`
* `0 <= nums[i] <= 10^9`

## ac

```java
```
