(I am unable to find a link on the problem page)
4 years, 6 months ago
When you get a problem right, you are randomly selected to submit a solution. A box will pop-up and provide a place to enter your solution. A few people are randomly selected every week and the best ones get featured the following week.
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Glad to know this answer but that's a shame, as I've had some solutions I wanted to share, but I've never been offered the opportunity.