add leetcode problem-cn part2

算法题（国内版）/problem (Chinese)/零矩阵 [zero-matrix-lcci].html

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+<p>编写一种算法，若M × N矩阵中某个元素为0，则将其所在的行与列清零。</p>
+
+<p>&nbsp;</p>
+
+<p><strong>示例 1：</strong></p>
+
+<pre><strong>输入：</strong>
+[
+  [1,1,1],
+  [1,0,1],
+  [1,1,1]
+]
+<strong>输出：</strong>
+[
+  [1,0,1],
+  [0,0,0],
+  [1,0,1]
+]
+</pre>
+
+<p><strong>示例 2：</strong></p>
+
+<pre><strong>输入：</strong>
+[
+  [0,1,2,0],
+  [3,4,5,2],
+  [1,3,1,5]
+]
+<strong>输出：</strong>
+[
+  [0,0,0,0],
+  [0,4,5,0],
+  [0,3,1,0]
+]
+</pre>