163. Missing Ranges π
Description
You are given an inclusive range [lower, upper]
and a sorted unique integer array nums
, where all elements are within the inclusive range.
A number x
is considered missing if x
is in the range [lower, upper]
and x
is not in nums
.
Return the shortest sorted list of ranges that exactly covers all the missing numbers. That is, no element of nums
is included in any of the ranges, and each missing number is covered by one of the ranges.
Example 1:
Input: nums = [0,1,3,50,75], lower = 0, upper = 99 Output: [[2,2],[4,49],[51,74],[76,99]] Explanation: The ranges are: [2,2] [4,49] [51,74] [76,99]
Example 2:
Input: nums = [-1], lower = -1, upper = -1 Output: [] Explanation: There are no missing ranges since there are no missing numbers.
Constraints:
-109 <= lower <= upper <= 109
0 <= nums.length <= 100
lower <= nums[i] <= upper
- All the values of
nums
are unique.
Solutions
Solution 1: Simulation
We can simulate the problem directly according to the requirements.
The time complexity is $O(n)$, where $n$ is the length of the array $nums$. Ignoring the space consumption of the answer, the space complexity is $O(1)$.
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