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]
Explanation: The first pair [1,2] means we have freq = 1 and val = 2 so we generate the array [2].
The second pair [3,4] means we have freq = 3 and val = 4 so we generate [4,4,4].
At the end the concatenation [2] + [4,4,4,4] is [2,4,4,4].
Constraints:
2 <= nums.length <= 100
nums.length % 2 == 0
1 <= nums[i] <= 100
来源：力扣（LeetCode）
链接：https://leetcode-cn.com/problems/decompress-run-length-encoded-list
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python3:
1 class Solution: 2 def decompressRLElist(self, nums: List[int]) -> List[int]: 3 rst = [] 4 for i in range(len(nums)): 5 if 0 == i % 2: 6 tmp = nums[i]*[nums[i + 1]] 7 rst += tmp 8 return rst