Earned on 3 Feb 2012 for solving Problem 1. Times 2 - START HERE.
Earned on 17 Dec 2012 for commenting on Solution 112271.
Earned on 3 Feb 2012 for liking Problem 15. Find the longest sequence of 1's in a binary seq....
Earned on 14 Mar 2014 for creating Problem 1164. Sum the Digits of a Number.
Earned on 19 Apr 2015 for first solving Problem 1169. Count the Number of Directed Cycles in a Graph.
Solve all the problems in CUP Challenge problem group.
Solve a problem with a best solution.
Earned on 12 Oct 2015 for having 50 or more solvers for Problem 1188. The Answer to Life, the Universe, and Everythi....
Earned on 4 Jan 2013 for solving all the problems in Tiles Challenge.
Solve all the problems in ASEE Challenge problem group.
Solve all the problems in Cody Challenge problem group.
Create 10 problems.
Solve 500 problems.
Solve all the problems in Modeling and Simulation Challenge problem group.
Solve all the problems in Magic Numbers problem group.
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.
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