存量题库数据更新

leetcode-cn/problem (English)/矩形面积 II(English) [rectangle-area-ii].html

@@ -5,22 +5,22 @@
 <p>Return <em>the <strong>total area</strong></em>. Since the answer may be too large, return it <strong>modulo</strong> <code>10<sup>9</sup> + 7</code>.</p>
 
 <p>&nbsp;</p>
-<p><strong>Example 1:</strong></p>
+<p><strong class="example">Example 1:</strong></p>
 <img alt="" src="https://s3-lc-upload.s3.amazonaws.com/uploads/2018/06/06/rectangle_area_ii_pic.png" style="width: 600px; height: 450px;" />
 <pre>
 <strong>Input:</strong> rectangles = [[0,0,2,2],[1,0,2,3],[1,0,3,1]]
 <strong>Output:</strong> 6
-<strong>Explanation: </strong>A total area of 6 is covered by all three rectangales, as illustrated in the picture.
+<strong>Explanation:</strong> A total area of 6 is covered by all three rectangles, as illustrated in the picture.
 From (1,1) to (2,2), the green and red rectangles overlap.
 From (1,0) to (2,3), all three rectangles overlap.
 </pre>
 
-<p><strong>Example 2:</strong></p>
+<p><strong class="example">Example 2:</strong></p>
 
 <pre>
 <strong>Input:</strong> rectangles = [[0,0,1000000000,1000000000]]
 <strong>Output:</strong> 49
-<strong>Explanation: </strong>The answer is 10<sup>18</sup> modulo (10<sup>9</sup> + 7), which is 49.
+<strong>Explanation:</strong> The answer is 10<sup>18</sup> modulo (10<sup>9</sup> + 7), which is 49.
 </pre>
 
 <p>&nbsp;</p>
@@ -30,4 +30,6 @@ From (1,0) to (2,3), all three rectangles overlap.
 	<li><code>1 &lt;= rectangles.length &lt;= 200</code></li>
 	<li><code>rectanges[i].length == 4</code></li>
 	<li><code>0 &lt;= x<sub>i1</sub>, y<sub>i1</sub>, x<sub>i2</sub>, y<sub>i2</sub> &lt;= 10<sup>9</sup></code></li>
+	<li><code>x<sub>i1 &lt;= </sub>x<sub>i2</sub></code></li>
+	<li><code>y<sub>i1 &lt;=</sub> y<sub>i2</sub></code></li>
 </ul>