Solution of the task: IMO Shortlist 1971 problem 17
Solutions
#Time ↓TaskUserSolutionCorrectness
69028 years, 4 monthsIMO Shortlist 1971 problem 17asdf empty  
52039 yearsIMO Shortlist 1971 problem 17IvanSincic empty  
262310 years, 4 monthsIMO Shortlist 1971 problem 17abeker empty