Solution of the task: IMO Shortlist 1971 problem 10
Solutions
#Time ↓TaskUserSolutionCorrectness
138396 years, 9 monthsIMO Shortlist 1971 problem 10PETARMAT empty  
88968 years, 8 monthsIMO Shortlist 1971 problem 10marin049 empty  
58089 years, 7 monthsIMO Shortlist 1971 problem 10andrija_ empty