How to generate unique combination?

#1

How to generate unique combination in sorting order.

#2

You can refer this

#3

What is the mistake in this . https://ide.codingblocks.com/s/282163

#4

now code is similar still wrong output. https://ide.codingblocks.com/s/282392 and also please explain condition of repeating element.

#5

There was a minor mistake. Check now

#6

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