Solution of the task: IMO Shortlist 1972 problem 12
Solutions
#Time ↓TaskUserSolutionCorrectness
223811 year, 2 monthsIMO Shortlist 1972 problem 12ToplaCokolada empty  
53879 years, 10 monthsIMO Shortlist 1972 problem 12ivl empty  
398510 years, 5 monthsIMO Shortlist 1972 problem 12ad empty