add leetcode problem-cn part2

算法题（国内版）/problem (English)/排序矩阵查找(English) [sorted-matrix-search-lcci].html

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+<p>Given an M x N matrix in which each row and each column is sorted in ascending order, write a method to find an element.</p>
+
+<p><strong>Example:</strong></p>
+
+<p>Given matrix:</p>
+
+<pre>
+[
+  [1,   4,  7, 11, 15],
+  [2,   5,  8, 12, 19],
+  [3,   6,  9, 16, 22],
+  [10, 13, 14, 17, 24],
+  [18, 21, 23, 26, 30]
+]
+</pre>
+
+<p>Given target&nbsp;=&nbsp;5,&nbsp;return&nbsp;<code>true.</code></p>
+
+<p>Given target&nbsp;=&nbsp;20, return&nbsp;<code>false.</code></p>