leetcode  每日一题 1470. 重新排列数组

class Solution {
    public int[] shuffle(int[] nums, int n) {
        int[] arr = new int[nums.length];
        for (int i = 0; i < nums.length; i++) {
            if(i < n){
                arr[i*2] = nums[i];
            }else{
                arr[(i-n)*2 +1] = nums[i];
            }
        }
        return arr;
    }
}