Given an array of integers numbers, construct a new array in the following manner:

• The first element of the new array is the first element of numbers
• The second element of the new array is the last element of numbers
• The third element of the new array is the second element of numbers
• The fourth element of the new array is the second-to-last element of numbers
• ... and so on, until the new array contains all elements of numbers

Note: You are not expected to provide the most optimal solution, but a solution with time complexity not worse than O(numbers.length^2) will fit within the execution time limit.

Example

• For numbers = [0, 4, 3, 2, 1], the output should be
  solution(numbers) = [0, 1, 4, 2, 3] Explanation:
  Following the rules above, we get the following sequence
  numbers[0], numbers[4], numbers[1], numbers[3], numbers[2],
  which results in [0, 1, 4, 2, 3].
• For numbers = [-5, 4, 0, 3, 2, 2], the output should be
  solution(numbers) = [-5, 2, 4, 2, 0, 3] Explanation:
  Following the rules above, we get the following sequence
  numbers[0], numbers[5], numbers[1], numbers[4], numbers[2], numbers[3],
  which results in [-5, 2, 4, 2, 0, 3].

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In Unix, there are two common ways to execute a command:

• Entering its name, e.g., "cp" or "ls"
• Entering "<index>". This notation is used to repeat the index-th (1-based) command since the start of the session.

For example, suppose that the user has entered the following commands:

ls  
cp  
mv  
11  
13  
16  

• "11" would trigger the execution of "ls"
• "13" would repeat "mv"
• "16" would repeat "mv"

Problem Statement

You are given a sequence of commands commands that the user has entered in the terminal since the start of the session. Each command can be one of the following: "cp", "ls", "mv", or "<index>".

Calculate the number of times each of "cp", "ls", and "mv" commands was executed and return an array of three integers in the following form:

[# of times for "cp", # of times for "ls", # of times for "mv"]

Note: You are not expected to provide the most optimal solution, but a solution with time complexity not worse than O(commands.length^2) will fit within the execution time limit.

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