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Sep 23, 2019 at 0:48 comment added Jo King +1 for proof of optimality in an otherwise trivial answer
Sep 23, 2019 at 0:14 history edited user202729 CC BY-SA 4.0
added 841 characters in body
Sep 23, 2019 at 0:08 history edited user202729 CC BY-SA 4.0
added 841 characters in body
Sep 22, 2019 at 13:50 history answered user202729 CC BY-SA 4.0