2019/9/12: NOIP 2007 to improve the Preliminary Round: 46 minutes
2019/9/14: NOIP 2008 to improve the Preliminary Round: 81.5 points
2019/9/12: NOIP 2007 to improve the Preliminary Round: 46 minutes
2019/9/14: NOIP 2008 to improve the Preliminary Round: 81.5 points