2048. Build Array from Permutation
My accepted Python solution to LeetCode problem 2048, Build Array from Permutation, running in 0ms.
- Difficulty: Easy
- Python
- Runtime 0ms
- Memory 17.4MB
- Updated
Read the problem on LeetCode View on GitHub
The problem statement is LeetCode’s and stays on their site. What follows is my accepted solution.
Python
Accepted on LeetCode — runtime 0ms, memory 17.4MB, accepted 2025-12-29.
class Solution:
def buildArray(self, nums: List[int]) -> List[int]:
# Simple mapping: ans[i] = nums[nums[i]]
# Time: O(n), Space: O(n) for output
return [nums[nums[i]] for i in range(len(nums))]