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SUBMIT YOUR IDEAFirst instinct was to generate rows for every date after determining the Replaced Date. Checked a few solutions and realized that is not necessary - just check if date from the data files falls between Install and Replace Dates.
I had to peek at the solution because I couldn't figure out what the challenge was asking. I still don't really understand it very well.
Solved! The hint said to use the day before the Install Date as the Removal Date, but the answer within the Start File wanted the actual Install Date as the Removal Date
Done!