【leetcode】1313. Decompress Run-Length Encoded List

题目如下：

We are given a list nums of integers representing a list compressed with run-length encoding.

Consider each adjacent pair of elements [a, b] = [nums[2*i], nums[2*i+1]] (with i >= 0).  For each such pair, there are a elements with value b in the decompressed list.

Return the decompressed list.

Example 1:

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

Constraints:

• 2 <= nums.length <= 100
• nums.length % 2 == 0
• 1 <= nums[i] <= 100

解题思路：送分题。

代码如下：

class Solution(object):
    def decompressRLElist(self, nums):
        """
        :type nums: List[int]
        :rtype: List[int]
        """
        res = []
        for i in range(0,len(nums)-1,2):
            res += [nums[i+1]] * nums[i]
        return res