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35 lines
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35 lines
1.9 KiB
HTML
<p>You are given two lists of closed intervals, <code>firstList</code> and <code>secondList</code>, where <code>firstList[i] = [start<sub>i</sub>, end<sub>i</sub>]</code> and <code>secondList[j] = [start<sub>j</sub>, end<sub>j</sub>]</code>. Each list of intervals is pairwise <strong>disjoint</strong> and in <strong>sorted order</strong>.</p>
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<p>Return <em>the intersection of these two interval lists</em>.</p>
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<p>A <strong>closed interval</strong> <code>[a, b]</code> (with <code>a <= b</code>) denotes the set of real numbers <code>x</code> with <code>a <= x <= b</code>.</p>
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<p>The <strong>intersection</strong> 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 <code>[1, 3]</code> and <code>[2, 4]</code> is <code>[2, 3]</code>.</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<img alt="" src="https://assets.leetcode.com/uploads/2019/01/30/interval1.png" style="width: 700px; height: 194px;" />
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<pre>
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<strong>Input:</strong> firstList = [[0,2],[5,10],[13,23],[24,25]], secondList = [[1,5],[8,12],[15,24],[25,26]]
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<strong>Output:</strong> [[1,2],[5,5],[8,10],[15,23],[24,24],[25,25]]
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</pre>
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<p><strong class="example">Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> firstList = [[1,3],[5,9]], secondList = []
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<strong>Output:</strong> []
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</pre>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li><code>0 <= firstList.length, secondList.length <= 1000</code></li>
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<li><code>firstList.length + secondList.length >= 1</code></li>
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<li><code>0 <= start<sub>i</sub> < end<sub>i</sub> <= 10<sup>9</sup></code></li>
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<li><code>end<sub>i</sub> < start<sub>i+1</sub></code></li>
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<li><code>0 <= start<sub>j</sub> < end<sub>j</sub> <= 10<sup>9</sup> </code></li>
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<li><code>end<sub>j</sub> < start<sub>j+1</sub></code></li>
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</ul>
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