Solution of the task: IMO Shortlist 2015 problem C4
Solutions
#Time ↓TaskUserSolutionCorrectness
160534 years, 1 monthIMO Shortlist 2015 problem C4binkret empty  
145837 years, 10 monthsIMO Shortlist 2015 problem C4marin049 empty  
144077 years, 10 monthsIMO Shortlist 2015 problem C4PETARMAT empty