Solution of the task: IMO Shortlist 2005 problem C4
Solutions
#Time ↓TaskUserSolutionCorrectness
205693 years, 4 monthsIMO Shortlist 2005 problem C411235 empty  
115229 years, 1 monthIMO Shortlist 2005 problem C4PETARMAT empty  
704810 years, 8 monthsIMO Shortlist 2005 problem C4abeker empty