Leetcode - Create Target Array in the Given Order
https://leetcode.com/problems/create-target-array-in-the-given-order/
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]
It's like insert sort. Time complexity is O(n^2).
func createTargetArray(nums []int, index []int) []int { size := len(nums) result := make([]int, size) for i := 0; i < size; i++ { num := nums[i] insertPosition := index[i] move(result, insertPosition) result[insertPosition] = num } return result } func move(nums []int, start int) { for i := len(nums)-1; i > start; i-- { nums[i] = nums[i-1] } }