Solution of the task: IMO Shortlist 1970 problem 12
Solutions
#Time ↓TaskUserSolutionCorrectness
138406 years, 7 monthsIMO Shortlist 1970 problem 12PETARMAT empty  
120147 years, 1 monthIMO Shortlist 1970 problem 12marin049 empty  
114857 years, 5 monthsIMO Shortlist 1970 problem 12JakovCigrovski empty  
53859 years, 7 monthsIMO Shortlist 1970 problem 12ivl empty