You are given two lists of closed intervals, firstList and secondList, where firstList[i] = [starti, endi] and secondList[j] = [startj, endj]. Each list of intervals is pairwise disjoint and in sorted order.
Return the intersection of these two interval lists.
\n\nA closed interval [a, b] (with a <= b) denotes the set of real numbers x with a <= x <= b.
The intersection of two closed intervals is a set of real numbers that are either empty or represented as a closed interval. For example, the intersection of [1, 3] and [2, 4] is [2, 3].
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Example 1:
\n![\"\"](\"https://assets.leetcode.com/uploads/2019/01/30/interval1.png\")
\n\nInput: firstList = [[0,2],[5,10],[13,23],[24,25]], secondList = [[1,5],[8,12],[15,24],[25,26]]\nOutput: [[1,2],[5,5],[8,10],[15,23],[24,24],[25,25]]\n\n\n
Example 2:
\n\n\nInput: firstList = [[1,3],[5,9]], secondList = []\nOutput: []\n\n\n
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Constraints:
\n\n0 <= firstList.length, secondList.length <= 1000firstList.length + secondList.length >= 10 <= starti < endi <= 109endi < starti+10 <= startj < endj <= 109 endj < startj+1Compiled with clang 11 using the latest C++ 20 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.
Most standard library headers are already included automatically for your convenience.
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