Update binary_op.md

eadst · web-flow · commit 56ee84db38b7 · 2021-08-08T10:17:18.000-05:00
diff --git a/data_structure/binary_op.md b/data_structure/binary_op.md
@@ -283,4 +283,4 @@ class Solution:
 ## 参考链接
 
 - [ ] [一篇读懂Python中的位运算](https://www.cnblogs.com/Neeo/articles/10536202.html) 
-- [ ] （https://leetcode-cn.com/problems/single-number-ii/solution/single-number-ii-mo-ni-san-jin-zhi-fa-by-jin407891/）
+- [ ] [只出现一次的数字 II](https://leetcode-cn.com/problems/single-number-ii/solution/single-number-ii-mo-ni-san-jin-zhi-fa-by-jin407891/)
