add leetcode problem-cn part2

算法题（国内版）/problem (Chinese)/交换数字 [swap-numbers-lcci].html

@@ -0,0 +1,15 @@
+<p>编写一个函数，不用临时变量，直接交换<code>numbers = [a, b]</code>中<code>a</code>与<code>b</code>的值。</p>
+
+<p><strong>示例：</strong></p>
+
+<pre>
+<strong>输入:</strong> numbers = [1,2]
+<strong>输出:</strong> [2,1]
+</pre>
+
+<p><strong>提示：</strong></p>
+
+<ul>
+	<li><code>numbers.length == 2</code></li>
+	<li><code>-2147483647 <= numbers[i] <= 2147483647</code></li>
+</ul>