Solution of the task: IMO Shortlist 2013 problem N6
Solutions
#Time ↓TaskUserSolutionCorrectness
141958 years, 1 monthIMO Shortlist 2013 problem N6PETARMAT empty  
130808 years, 5 monthsIMO Shortlist 2013 problem N6lkkraljevic to do  
127268 years, 6 monthsIMO Shortlist 2013 problem N6marin049 empty