Not able to find the wrong answers

#1

I’m getting 8/10 and not able to get all my answers right. Plz help.

#2

Which question are you having doubt in?

#3

I’m not sure. But maybe 9th and 10th

#4

For 9th answer is
Algorithm is correct and uses O(N) time and O(N) extra space.
o(N) is because we are copying the string into rev
and algorithm is correct

For 10th answer is
bca cab cba abc

it is just printing next_permutation

#5

My answers were same. Can you give me a list of all the answers only.

#6

Clarify my doubt here, plz

#7

6 a
7 d
8 d
5 b
1 d
2 b
3 c
4 c

#8

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