User contributions
- 19:18, 25 September 2013 (diff | hist) . . (+947) . . 2006 Canadian MO Problems/Problem 1
- 23:20, 24 September 2013 (diff | hist) . . (0) . . 2013 USAJMO Problems/Problem 4
- 23:15, 24 September 2013 (diff | hist) . . (0) . . m 2013 USAJMO Problems/Problem 4 (Original prove is wrong)
