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1024core
on Feb 14, 2017
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A scalper who used bots to buy millions of tickets...
If they had just scraped ~205 images, they would have a > 50% chance of getting a repeat.
greeneggs
on Feb 14, 2017
[–]
Indeed, by the "birthday paradox." And, by the "coupon collector's problem," the expected time to have seen all 30,000 images is about n*log(n) ~= 310,000 random images.
https://en.wikipedia.org/wiki/Coupon_collector's_problem
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