Sample Output doubt

#1

Lexicographic means alphabetical order. But last 2 outputs are not in alphabetical order. Please explain

#2

hello @vatsal50

u cannot change the order of characters ie the relative ordering must remain same as given in input. u r allowed only to remove some characters from the string .

bbbacdbbb

here remove all b from starting and last 2 bs u will get ->
acdb

#3

is bacd a valid ans?

#4

…

no it is not lexocographically smallest.

#5

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