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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
You can't just use (index-displaced) because many positions in between might have already been removed. You need some data structure that can answer questions like "how many numbers in this range have not been removed?" and make updates like "remove this number" efficiently. I did this using a segment tree: https://github.com/razimantv/leetcode-solutions/tree/main/Solutions/M/make-array-empty
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