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programmercarl
2025-03-17 15:52:23 +08:00
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problems/0090.子集II.md
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@@ -39,7 +39,7 @@
用示例中的[1, 2, 2] 来举例，如图所示： （**注意去重需要先对集合排序**）
![90.子集II](https://code-thinking-1253855093.file.myqcloud.com/pics/20201124195411977.png)
![90.子集II](https://file.kamacoder.com/pics/20201124195411977.png)
从图中可以看出，同一树层上重复取2 就要过滤掉，同一树枝上就可以重复取2，因为同一树枝上元素的集合才是唯一子集！