Solution of the task: IMO Shortlist 1987 problem 16
Solutions
#Time ↓TaskUserSolutionCorrectness
156647 years, 1 monthIMO Shortlist 1987 problem 16matsimic empty  
153487 years, 5 monthsIMO Shortlist 1987 problem 16ivanvojvodic empty  
100979 years, 8 monthsIMO Shortlist 1987 problem 16Lugo empty