a = [1,2,4]
b = [1,2,3,4,5,6]
想输出一个结果，c 是 a 和 b 的并集，但每个值要标明是否是交集，如
c = {"1" :True, "2" :True, "3" :False, "4": True, "5": False, "6":False}
应该怎么处理？😭
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This topic created in 2891 days ago, the information mentioned may be changed or developed.
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kkkkkruaDec 10, 2018
1
leetcode，交集
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asLw0P981N0M0TCCDec 10, 2018
2
都是有序的话 我记得有个是 2 个从头互相比较的 好像要额外空间存储
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3
```python
a = [1,2,4] b = [1,2,3,4,5,6] u = set(a+b) r = {} for x in u: r[str(x)] = (x in a and x in b) print(r) ``` |
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4
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5
第一个依次存入哈希字典, key 是 number, value 是 false
然后遍历第二个，有的改 true, 没的存 key: false |
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smdbhDec 10, 2018
6
L3 +1
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zxcvshDec 10, 2018 via iPhone
7
推荐 3 楼，5 楼也可行，但是 3 楼相对有优化
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v2gbaDec 10, 2018
8
>>> s1 = collections.Counter(a+b)
>>> s2 = collections.Counter(set(a+b)) >>> s1.subtract(s2) >>> s1 Counter({1: 1, 2: 1, 4: 1, 3: 0, 5: 0, 6: 0}) |
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