Next permutation question

#1

how does this next permutation function working when will loop terminate in ques 10

#2

@shampblocks
If the function can determine the next higher permutation, it rearranges the elements as such and returns true. If that was not possible (because it is already at the largest possible permutation), it rearranges the elements according to the first permutation (sorted in ascending order) and returns false.

#3

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