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Formatted question description: https://leetcode.ca/all/1389.html
1389. Create Target Array in the Given Order (Easy)
Given two arrays of integers nums
and index
. Your task is to create target array under the following rules:
- Initially target array is empty.
- From left to right read nums[i] and index[i], insert at index
index[i]
the valuenums[i]
in target array. - Repeat the previous step until there are no elements to read in
nums
andindex.
Return the target array.
It is guaranteed that the insertion operations will be valid.
Example 1:
Input: nums = [0,1,2,3,4], index = [0,1,2,2,1] Output: [0,4,1,3,2] Explanation: nums index target 0 0 [0] 1 1 [0,1] 2 2 [0,1,2] 3 2 [0,1,3,2] 4 1 [0,4,1,3,2]
Example 2:
Input: nums = [1,2,3,4,0], index = [0,1,2,3,0] Output: [0,1,2,3,4] Explanation: nums index target 1 0 [1] 2 1 [1,2] 3 2 [1,2,3] 4 3 [1,2,3,4] 0 0 [0,1,2,3,4]
Example 3:
Input: nums = [1], index = [0] Output: [1]
Constraints:
1 <= nums.length, index.length <= 100
nums.length == index.length
0 <= nums[i] <= 100
0 <= index[i] <= i
Related Topics:
Array
Solution 1.
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class Solution { public int[] createTargetArray(int[] nums, int[] index) { List<Integer> list = new ArrayList<Integer>(); int length = nums.length; for (int i = 0; i < length; i++) list.add(index[i], nums[i]); int[] target = new int[length]; for (int i = 0; i < length; i++) target[i] = list.get(i); return target; } } ############ class Solution { public int[] createTargetArray(int[] nums, int[] index) { int n = nums.length; List<Integer> target = new ArrayList<>(); for (int i = 0; i < n; ++i) { target.add(index[i], nums[i]); } int[] res = new int[n]; for (int i = 0; i < n; ++i) { res[i] = target.get(i); } return res; } }
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// OJ: https://leetcode.com/problems/create-target-array-in-the-given-order/ // Time: O(N^2) // Space: O(1) class Solution { public: vector<int> createTargetArray(vector<int>& nums, vector<int>& index) { vector<int> ans; int N = nums.size(); for (int i = 0; i < N; ++i) { ans.insert(ans.begin() + index[i], nums[i]); } return ans; } };
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class Solution: def createTargetArray(self, nums: List[int], index: List[int]) -> List[int]: target = [] for i in range(len(nums)): target.insert(index[i], nums[i]) return target
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func createTargetArray(nums []int, index []int) []int { target := make([]int, len(nums)) for i, v := range nums { copy(target[index[i]+1:], target[index[i]:]) target[index[i]] = v } return target }
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function createTargetArray(nums: number[], index: number[]): number[] { let ans = []; for (let i = 0; i < nums.length; i++) { ans.splice(index[i], 0, nums[i]); } return ans; }