Solution of the task: IMO Shortlist 1993 problem A9
Solutions
#Time ↓TaskUserSolutionCorrectness
111387 years, 8 monthsIMO Shortlist 1993 problem A9Lugo empty  
16712 years, 9 monthsIMO Shortlist 1993 problem A9dcevid to do  
6312 years, 9 monthsIMO Shortlist 1993 problem A9grga to do