EasyNo. 1678
Goal Parser Interpretation — LeetCode 1678 Python Solution
- Pattern
- Hash Map
- Topics
- String
- Reading time
- 2 min
- Source
- leetcode.com
The problem
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.
Example
- Input
- command = "G()(al)"
- Output
- "Goal"
- Explanation
- The Goal Parser interprets the command as follows:
Python solution
class Solution:
def interpret(self, command: str) -> str:
return command.replace('()', 'o').replace('(al)', 'al')Complexity
- Time
- O(n)
- Space · auxiliary
- O(1)
Pattern: Hash Map
Trade memory for time: remember what you have seen so the second pass never happens. LeetCode 1678. Goal Parser Interpretation is filed here because the reference solution below belongs to the algorithm family this hub collects, even though its LeetCode tags point elsewhere.
The hash map guide has the Python template for the pattern and the 709 LeetCode problems that use it.
Related problems
| No. | Problem | Difficulty |
|---|---|---|
| 0006 | Zigzag Conversion | Medium |
| 0008 | String to Integer (atoi) | Medium |
| 0038 | Count and Say | Medium |
| 0058 | Length of Last Word | Easy |
| 0065 | Valid Number | Hard |
| 0068 | Text Justification | Hard |
Frequently asked questions
- How hard is LeetCode 1678. Goal Parser Interpretation?
LeetCode 1678. Goal Parser Interpretation is rated Easy on LeetCode.
- What is the time complexity of LeetCode 1678. Goal Parser Interpretation?
The Python solution on this page runs in O(n).
- What is the space complexity of LeetCode 1678. Goal Parser Interpretation?
The Python solution on this page uses O(1) auxiliary space.
- What topics does LeetCode 1678. Goal Parser Interpretation cover?
LeetCode 1678. Goal Parser Interpretation is tagged String on LeetCode.