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Earned on 5 Feb 2013 for creating Problem 1249. first step for Huffman Coding (easy).
Must have 50 solvers for a problem you created.
Create 10 problems.
Solve 500 problems.
Must receive 25 total likes for the problems you created.
Must receive 50 total likes for the solutions you submitted.
Must receive 10 likes for a solution you submitted.
Must receive 10 likes for a problem you created.