Answer 3 questions that were unanswered for more than 30 days
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Accept 20 answers given by other contributors
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Your submissions received 3 five star ratings
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Solve a problem for the first time
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Download any 10 unique submissions
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Publish your first submission
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Provide your first answer ever to someone else's question
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已解决
Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...
4 years 前
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