回答編集履歴
1
pandasを使ったコードを追加
test
CHANGED
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@@ -7,3 +7,47 @@
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質問にある領域１，領域２、領域３と見比べてみてください。
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追記
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うまく動いたようで良かったですね。
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最初に作ったコードを載せておきます。(defの行を入れたので一行増えています)
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ご参考まで
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```python
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>>> import pandas as pd
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>>> left = [1, 3, 6]
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>>> right = [4, 5, 8]
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>>>
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>>> import pandas as pd
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>>> def unite(left, right):
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... df = pd.DataFrame({'x':left+right, 'w':[1]*len(left)+[-1]*len(right)}).sort_values('x')
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... df['cs'] = df['w'].cumsum()
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... return list(df[(df['w']==1) & (df['cs']==1)]['x']), list(df[(df['w']==-1) & (df['cs']==0)]['x'])
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...
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>>> unite(left, right)
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([1, 6], [5, 8])
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```
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