Solution of the task: IMO Shortlist 1971 problem 10
Solutions
#Time ↓TaskUserSolutionCorrectness
138395 years, 12 monthsIMO Shortlist 1971 problem 10PETARMAT empty  
88967 years, 10 monthsIMO Shortlist 1971 problem 10marin049 empty  
58088 years, 9 monthsIMO Shortlist 1971 problem 10andrija_ empty