shuffle-the-array_1470.py

# 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

# ---------------------------------------Runtime 58 ms Beats 36.03% Memory 16.89 MB Beats 23.07%---------------------------------------

from typing import List


class Solution:
    def shuffle(self, nums: List[int], n: int) -> List[int]:
        x = nums[:n][::-1]
        y = nums[n:][::-1]
        res = []

        while x and y:
            res.append(x.pop())
            res.append(y.pop())
        return res