1558. Minimum Numbers of Function Calls to Make Target Array

Medium

576

29

You are given an integer array `nums`

. You have an integer array `arr`

of the same length with all values set to `0`

initially. You also have the following `modify`

function:

You want to use the modify function to convert `arr`

to `nums`

using the minimum number of calls.

Return *the minimum number of function calls to make *`nums`

* from *`arr`

.

The test cases are generated so that the answer fits in a **32-bit** signed integer.

**Example 1:**

Input:nums = [1,5]Output:5Explanation: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:3Explanation: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:6Explanation:(initial)[0,0,0] -> [1,0,0] -> [1,0,1] -> [2,0,2] -> [2,1,2] -> [4,2,4] ->[4,2,5](nums).

**Constraints:**

`1 <= nums.length <= 10`

^{5}`0 <= nums[i] <= 10`

^{9}

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