Timeline for Is this number triangular?

12 events

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Jun 17, 2020 at 9:04	history	edited	Community Bot		Commonmark migration
May 23, 2017 at 2:44	comment	added	Greg Martin		Oops sorry, didn't see the OP's comment! Yes, there are some "perverse" incentives in code golfing: that 1-byte savings is more important in a code-golf question than all the efficiency in the world :)
May 23, 2017 at 1:05	history	edited	ZaMoC	CC BY-SA 3.0	deleted 2 characters in body
May 23, 2017 at 1:03	comment	added	ZaMoC		OP says: "You may assume that the input is a positive integer under 10^6".But I like your idea and I will take it ,although mine gives the right result for every case using a list of 5040 elements but yours worst case needs a list of 999999 elements.Thanks for the tip!
May 23, 2017 at 0:35	comment	added	Greg Martin		I recommend replacing `7!` by `#`. First, it's shorter; more importantly, the current solution is not correct, as it artificially imposes a limit on the size of the input it works on.
May 22, 2017 at 21:12	review	Low quality posts
May 22, 2017 at 21:13
May 22, 2017 at 21:09	history	edited	ZaMoC	CC BY-SA 3.0	deleted 1 character in body
May 22, 2017 at 20:56	review	Low quality posts
May 22, 2017 at 20:57
May 22, 2017 at 20:53	history	edited	ZaMoC	CC BY-SA 3.0	deleted 3 characters in body
May 22, 2017 at 20:51	history	edited	ZaMoC	CC BY-SA 3.0	deleted 3 characters in body
May 22, 2017 at 20:45	history	edited	ZaMoC	CC BY-SA 3.0	deleted 1 character in body
May 22, 2017 at 20:37	history	answered	ZaMoC	CC BY-SA 3.0