Solution of the task: IMO Shortlist 1999 problem C5
Solutions
#Time ↓TaskUserSolutionCorrectness
149466 years, 4 monthsIMO Shortlist 1999 problem C5nolo_moses empty  
126897 years, 1 monthIMO Shortlist 1999 problem C5PETARMAT empty  
85488 years, 11 monthsIMO Shortlist 1999 problem C5dpaleka empty