Solution of the task: IMO Shortlist 2009 problem C7
Solutions
#Time ↓TaskUserSolutionCorrectness
151367 years, 1 monthIMO Shortlist 2009 problem C7keko37 empty  
126687 years, 2 monthsIMO Shortlist 2009 problem C7lkkraljevic empty  
136667 years, 10 monthsIMO Shortlist 2009 problem C7PETARMAT empty  
158912 years, 9 monthsIMO Shortlist 2009 problem C7dcevid empty