Introduction

In this blog post, we will explore how to solve the LeetCode problem "1678" using AI. LeetCode is a popular platform for preparing for coding interviews, and with the help of AI tools like Chatmagic, we can generate solutions quickly and efficiently - helping you pass the interviews and get the job offer without having to study for months.

Problem Statement

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" Explanation: 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.

Explanation

Here's a breakdown of the solution:

• Iterate and Interpret: Traverse the input string command character by character.
• Pattern Matching: Identify the specific patterns "G", "()", and "(al)" as you iterate.

• Concatenate Result: Append the corresponding interpreted string ("G", "o", "al") to the result.

• Runtime Complexity: O(n), where n is the length of the input string command.

• Storage Complexity: O(n), where n is the length of the input string command (due to the result string).

Code

    def interpret(command: str) -> str:
    """
    Interprets a string command according to the Goal Parser's rules.

    Args:
        command: The string command to interpret.

    Returns:
        The Goal Parser's interpretation of the command.
    """

    result = ""
    i = 0
    while i < len(command):
        if command[i] == 'G':
            result += 'G'
            i += 1
        elif command[i:i+2] == '()':
            result += 'o'
            i += 2
        else:
            result += 'al'
            i += 4
    return result