Solution of the task: IMO Shortlist 2011 problem C4
Solutions
#Time ↓TaskUserSolutionCorrectness
228912 years, 4 monthsIMO Shortlist 2011 problem C4stmmkiki empty  
178985 years, 4 monthsIMO Shortlist 2011 problem C4keko37 empty  
115049 years, 1 monthIMO Shortlist 2011 problem C4PETARMAT empty  
100719 years, 8 monthsIMO Shortlist 2011 problem C4abeker empty