Update algorithm.md

添加阿里考题
hongliuliao · Sep 27, 2020 · dcaaaea · dcaaaea
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commit dcaaaea
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diff --git a/alibaba/algorithm.md b/alibaba/algorithm.md
@@ -17,3 +17,4 @@
 | 剑指 Offer 39\. 数组中出现次数超过一半的数字    | 1  |
 | 215\. 数组中的第K个最大元素               | 1  |
 | 72\. 编辑距离                       | 1  |
+| 56\. 合并区间                       | 1  |