25 October 2025

• curprev 19:5719:57, 25 October 2025 Daijobu talk contribs m 7,661 bytes +171 No edit summary

25 January 2022

• curprev 16:4416:44, 25 January 2022 Shihan talk contribs m 7,490 bytes 0 →Solution 1
• curprev 16:4416:44, 25 January 2022 Shihan talk contribs 7,490 bytes 0 →Official Solution (MAA)
• curprev 16:4116:41, 25 January 2022 Shihan talk contribs 7,490 bytes +1,551 →Solution

18 September 2021

• curprev 14:5414:54, 18 September 2021 Pinkpig talk contribs 5,939 bytes +9 →Solution 1
• curprev 14:5314:53, 18 September 2021 Pinkpig talk contribs 5,930 bytes −20 →Solution 1
• curprev 14:5214:52, 18 September 2021 Pinkpig talk contribs 5,950 bytes +2,797 →Solution

26 November 2020

• curprev 00:5500:55, 26 November 2020 Math31415926535 talk contribs 3,153 bytes −72 →Solution 2

16 July 2020

• curprev 14:0714:07, 16 July 2020 Lopkiloinm talk contribs 3,225 bytes +72 →Solution

12 July 2019

• curprev 14:5714:57, 12 July 2019 Stephenpiano talk contribs m 3,153 bytes 0 →Solution

12 May 2018

• curprev 21:4221:42, 12 May 2018 Larryy talk contribs m 3,153 bytes −1 →Problem

25 January 2018

• curprev 15:3115:31, 25 January 2018 Herky talk contribs m 3,154 bytes +1 →Problem

25 June 2017

• curprev 14:5014:50, 25 June 2017 Piranavaa talk contribs 3,153 bytes +8 →Solution

4 July 2013

• curprev 22:3322:33, 4 July 2013 Nathan wailes talk contribs 3,145 bytes +15 No edit summary

2 June 2012

• curprev 14:0214:02, 2 June 2012 Yongyi781 talk contribs 3,130 bytes +2 →Solution

2 June 2011

• curprev 10:1910:19, 2 June 2011 Polya78 talk contribs 3,128 bytes +1,096 →Solution

18 August 2010

• curprev 12:0612:06, 18 August 2010 Ftong talk contribs 2,032 bytes +4 No edit summary
• curprev 12:0512:05, 18 August 2010 Ftong talk contribs 2,028 bytes +117 No edit summary
• curprev 11:2811:28, 18 August 2010 Ftong talk contribs 1,911 bytes +34 No edit summary
• curprev 11:2611:26, 18 August 2010 Ftong talk contribs 1,877 bytes +45 No edit summary
• curprev 11:2511:25, 18 August 2010 Ftong talk contribs 1,832 bytes +2 No edit summary
• curprev 11:2411:24, 18 August 2010 Ftong talk contribs 1,830 bytes −28 No edit summary

12 March 2009

• curprev 13:4613:46, 12 March 2009 Solafidefarms talk contribs 1,858 bytes +524 Formalization! Yay!

5 April 2007

• curprev 09:3209:32, 5 April 2007 Azjps talk contribs m 1,334 bytes +908 non-rigorous solution

30 March 2007

• curprev 17:5117:51, 30 March 2007 Azjps talk contribs 426 bytes +426 add prob, no solution yet