sir but what if there will odd number of people
example 7 people
than how will they exchange such that no people stay in its own house
like we can say 3 people exhange with other 3 people so total 6 people can exchange what will happen to that 1 remaning person ??? will out of 6 exchange any one can exchange with 7 person is it like that?? i mean can a person exchange twice?
Sir doubt in this question
the persons can change the house within self also!
example - (1 2 3 4)-(5 6 7)
then this arrangement is valid
( 4 5 6 7) - (1 2 3)
note that 1,2,3,4,5,6 has changed the positions, also 4 has also changed the position(occupied 1’s place), however 4 still remains in left part.
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