View profile information
Earned on 25 Jan 2012 for solving Problem 1. Times 2 - START HERE.
Earned on 25 Jan 2012 for liking Problem 15. Find the longest sequence of 1's in a binary seq....
Earned on 29 Feb 2012 for commenting on Solution 54164.
Earned on 13 Apr 2012 for creating Problem 581. Function composition.
Earned on 25 Jan 2012 for first solving Problem 7. Column Removal.
Solve all the problems in CUP Challenge problem group.
Solve a problem with a best solution.
Earned on 23 Apr 2015 for having 50 or more solvers for Problem 581. Function composition.
Solve all the problems in Tiles Challenge problem group.
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.
Earned on 23 May 2012 for Solution 4286 for having 10 or more likes.
Must receive 10 likes for a problem you created.
Choose your country to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
You can also select a location from the following list:
See all countries