Solution of the task: IMO Shortlist 2009 problem C7
Solutions
#Time ↓TaskUserSolutionCorrectness
151366 years, 3 monthsIMO Shortlist 2009 problem C7keko37 empty  
126686 years, 5 monthsIMO Shortlist 2009 problem C7lkkraljevic empty  
136667 yearsIMO Shortlist 2009 problem C7PETARMAT empty  
158911 years, 11 monthsIMO Shortlist 2009 problem C7dcevid empty