changyouren changyouren

@changyouren

China, beijing

Joined Sep 2021

World Rank: #1730 (17.1 points)

Institution: BJUT

Activity over the last year

MarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberJanuaryFebruaryless than 10 submissionsbetween 10 and 20 submissionsbetween 20 and 30 submissionsbetween 30 and 40 submissionsmore than 40 submissions

Effectiveness

 Problems solved
117
 Solutions submitted
288

Problems