Mathematics, 28.03.2021 16:00 goobert

A traveller arrived to an island where 50 natives lived. All the natives stood in a circle and each announced firstly the age of his left neighbour, then the age of his right neighbour. Each native is either a knight who told both numbers correctly or a knave who increased one of the numbers by 1 and decreased the other by 1 (on his choice). Is it always possible after that to establish which of the natives are knights and which are knaves?

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A traveller arrived to an island where 50 natives lived. All the natives stood in a circle and each...