docs: add a description of the solution to lc problem: No.0720

YangFong · YangFong · commit f7e3debe2475 · 2022-03-17T08:27:38.000+08:00
No.0720.Longest Word in Dictionary
diff --git a/solution/0700-0799/0720.Longest Word in Dictionary/README.md b/solution/0700-0799/0720.Longest Word in Dictionary/README.md
@@ -42,6 +42,8 @@
 
 <!-- 这里可写通用的实现逻辑 -->
 
+优先返回符合条件、**长度最长且字典序最小**的单词，那么可以进行依照该规则，先对 `words` 进行排序，免去多个结果之间的比较。
+
 <!-- tabs:start -->
 
 ### **Python3**
