add leetcode problem-cn part2

算法题（国内版）/problem (English)/水域大小(English) [pond-sizes-lcci].html

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+<p>You have an integer matrix representing a plot of land, where the value at that loca&shy;tion represents the height above sea level. A value of zero indicates water. A pond is a region of water connected vertically, horizontally, or diagonally. The size of the pond is the total number of connected water cells. Write a method to compute the sizes of all ponds in the matrix.</p>
+
+<p><strong>Example: </strong></p>
+
+<pre>
+<strong>Input: </strong>
+[
+  [0,2,1,0],
+  [0,1,0,1],
+  [1,1,0,1],
+  [0,1,0,1]
+]
+<strong>Output: </strong> [1,2,4]
+</pre>
+
+<p><strong>Note: </strong></p>
+
+<ul>
+	<li><code>0 &lt; len(land) &lt;= 1000</code></li>
+	<li><code>0 &lt; len(land[i]) &lt;= 1000</code></li>
+</ul>