Solution of the task: IMO Shortlist 1970 problem 12
Solutions
#Time ↓TaskUserSolutionCorrectness
138407 years, 6 monthsIMO Shortlist 1970 problem 12PETARMAT empty  
120148 years, 1 monthIMO Shortlist 1970 problem 12marin049 empty  
114858 years, 4 monthsIMO Shortlist 1970 problem 12JakovCigrovski empty  
538510 years, 6 monthsIMO Shortlist 1970 problem 12ivl empty