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by timmaxw
807 days ago
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Yes, Python dicts remember insertion order. This is different from C++ std::map, which maintains the keys in sorted order. For example, std::map::lower_bound(X) finds "the smallest key in the map which is greater than or equal to X" in O(log(N)) time. I don't think Python has any data structure in the standard library that supports this operation while also supporting insertion in O(log(N)) time. |
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