Leetcode 1678. Goal Parser Interpretation

You own a Goal Parser that can interpret a string command. The command consists of an alphabet of "G", "()" and/or "(al)" in some order. The Goal Parser will interpret "G" as the string "G", "()" as the string "o", and "(al)" as the string "al". The interpreted strings are then concatenated in the original order. Given the string command, return the Goal Parser's interpretation of command.

Programming Skills I Easy

Description

You own a Goal Parser that can interpret a string command. The command consists of an alphabet of "G", "()" and/or "(al)" in some order. The Goal Parser will interpret "G" as the string "G", "()" as the string "o", and "(al)" as the string "al". The interpreted strings are then concatenated in the original order.

Given the string command, return the Goal Parser’s interpretation of command.

Example 1:

Input: command = "G()(al)"
Output: "Goal"

• The Goal Parser interprets the command as follows:
  G -> G
  () -> o
  (al) -> al
  The final concatenated result is “Goal”.

Example 2:

Input: command = "G()()()()(al)"
Output: "Gooooal"

Example 3:

Input: command = "(al)G(al)()()G"
Output: "alGalooG"

Constraints:

• 1 <= command.length <= 100
• command consists of "G", "()", and/or "(al)" in some order.

Solution

class Solution:
    # Iteration
    # Time Complexity: BigO(N)
    # Space Complexity: BigO(1)
    def interpret(self, command: str) -> str:
        res = ''
        tmp = ''
        for i, val in enumerate(command):
            if val == 'G':
                res += 'G'
                continue
            tmp += val
            if tmp == '(al)':
                res += 'al'
                tmp = ''
            elif tmp == '()':
                res += 'o'
                tmp = ''
        return res

/**
 * Replace string
 * Time Complexity: BigO(N)
 * Space Complexity: BigO(1)
 */
function interpret(command: string): string {
  command = command.replace(/\(\)/g, "o");
  command = command.replace(/\(/g, "");
  command = command.replace(/\)/g, "");
  return command;
}