1470.Shuffle the Array

tags: `Easy`,`Array`

題目描述

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].

範例

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] <= 10³

解答

Javascript









function shuffle(nums, n) {
  const result = [];
  for (let i = 0; i < n; i++) {
    result.push(nums[i]);
    result.push(nums[i + n]);
  }

  return result;
}

Marsgoat Feb 6, 2023

Python



class Solution:
    def shuffle(self, nums: List[int], n: int) -> List[int]:
        return [j for i in zip(nums[:n], nums[n:]) for j in i]

Ron Chen Feb 6, 2023



class Solution:
    def shuffle(self, nums: List[int], n: int) -> List[int]:
        return list(chain(*zip(nums[:n],nums[n:])))

Yen-Chi ChenMon, Feb 6, 2023



class Solution:
    def shuffle(self, nums: List[int], n: int) -> List[int]:
        return [nums[(i & 1) * n + i // 2] for i in range(n * 2)]