Formatted question description: https://leetcode.ca/all/1920.html
1920. Build Array from Permutation
Level
Easy
Description
Given a zero-based permutation nums (0-indexed), build an array ans of the same length where ans[i] = nums[nums[i]] for each 0 <= i < nums.length and return it.
A zero-based permutation nums is an array of distinct integers from 0 to nums.length - 1 (inclusive).
Example 1:
Input: nums = [0,2,1,5,3,4]
Output: [0,1,2,4,5,3]
Explanation: The array ans is built as follows:
ans = [nums[nums[0]], nums[nums[1]], nums[nums[2]], nums[nums[3]], nums[nums[4]], nums[nums[5]]]
= [nums[0], nums[2], nums[1], nums[5], nums[3], nums[4]]
= [0,1,2,4,5,3]
**Example 2:**
Input: nums = [5,0,1,2,3,4] Output: [4,5,0,1,2,3] Explanation: The array ans is built as follows: ans = [nums[nums[0]], nums[nums[1]], nums[nums[2]], nums[nums[3]], nums[nums[4]], nums[nums[5]]] = [nums[5], nums[0], nums[1], nums[2], nums[3], nums[4]] = [4,5,0,1,2,3]
**Constraints:**
* `1 <= nums.length <= 1000`
* `0 <= nums[i] < nums.length`
* The elements in `nums` are **distinct**.
## Solution
Simply create the array `ans` as described in the problem, and return `ans`.
```java
class Solution {
public int[] buildArray(int[] nums) {
int length = nums.length;
int[] array = new int[length];
for (int i = 0; i < length; i++)
array[i] = nums[nums[i]];
return array;
}
}