[ Leetcode ] 1470. Shuffle the Array - Java

 

Given the array nums consisting of 2n elements in the form [x1,x2,...,xn,y1,y2,...,yn].

Return the array in the form [x1,y1,x2,y2,...,xn,yn].

 

Example 1:

 
 Input: nums = [2,5,1,3,4,7], n = 3 
 Output: [2,3,5,4,1,7] 
 Explanation: Since x1=2, x2=5, x3=1, y1=3, y2=4, y3=7 then the answer is [2,3,5,4,1,7].
 

Example 2:

 
 Input: nums = [1,2,3,4,4,3,2,1], n = 4 
 Output: [1,4,2,3,3,2,4,1]
 

Example 3:

 
 Input: nums = [1,1,2,2], n = 2 
 Output: [1,2,1,2]
 

 

Constraints:

• 1 <= n <= 500
• nums.length == 2n
• 1 <= nums[i] <= 10^3

 

Solution

 
 class Solution {
    public int[] shuffle(int[] nums, int n) {
        int[] answer = new int[n*2];
        for(int i=0; i< n ; i++){
            answer[2*i] = nums[i];
            answer[2*i+1] = nums[n+i];   
        }
        return answer;
    }
 }