Solution of the task: IMO Shortlist 2012 problem C4
Solutions
#Time ↓TaskUserSolutionCorrectness
198672 years, 3 monthsIMO Shortlist 2012 problem C411235 empty  
127166 years, 9 monthsIMO Shortlist 2012 problem C4PETARMAT empty  
105488 years, 2 monthsIMO Shortlist 2012 problem C4abeker empty