Given an array intervals where intervals[i] = [li, ri] represent the interval [li, ri), remove all intervals that are covered by another interval in the list.
The interval [a, b) is covered by the interval [c, d) if and only if c <= a and b <= d.
Return the number of remaining intervals.
\n\n\n
Example 1:
\n\n\nInput: intervals = [[1,4],[3,6],[2,8]]\nOutput: 2\nExplanation: Interval [3,6] is covered by [2,8], therefore it is removed.\n\n\n
Example 2:
\n\n\nInput: intervals = [[1,4],[2,3]]\nOutput: 1\n\n\n
\n
Constraints:
\n\n1 <= intervals.length <= 1000intervals[i].length == 20 <= li < ri <= 105Compiled with clang 11 using the latest C++ 17 standard.
Your code is compiled with level two optimization (-O2). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.
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