Check if All the Integers in a Range Are Covered
You are given a 2D integer array ranges and two integers left and right. Each ranges[i] = [starti, endi] represents an inclusive interval between starti and endi.
Return true if each integer in the inclusive range [left, right] is covered by at least one interval in ranges. Return false otherwise.
An integer x is covered by an interval ranges[i] = [starti, endi] if starti <= x <= endi.
Example 1
Input
ranges = [[1,2],[3,4],[5,6]], left = 2, right = 5Output
trueEvery integer between 2 and 5 is covered by at least one of the given ranges.
Example 2
Input
ranges = [[1,10],[10,20]], left = 21, right = 21Output
false21 is not covered by any range.
Constraints
- 1 <= ranges.length <= 50
- 1 <= starti <= endi <= 50
- 1 <= left <= right <= 50