You are given an array of commands. There are only three possible commands: cmd1, cmd2, and cmd3. Your task is to return an array of size 3 that contains the frequency of each command in the input array, in the order [frequency of cmd1, frequency of cmd2, frequency of cmd3].
Also, any element in the form of ![index] refers to the same command that was present at the position in the input array. Note that indexing starts from 1 (not 0).
Function Description
Complete the function commandFrequencyCounter in the editor.
commandFrequencyCounter has the following parameter:
String[] commands: an array of commands
Returns
int[]: an array of size 3 containing the frequency of each command
Example 1:
Input: commands = ["cmd1", "cmd2", "cmd3", "!1", "!2", "cmd3", "cmd1"]
Output: [3, 2, 2]
Explanation:At index 4 (!1), the command is the same as the command at index 1 (cmd1). At index 5 (!2), the command is the same as the command at index 2 (cmd2).
:)
input:
output: