# Help in Bitwise and Operator

Find all natural numbers $n$ that satisfy condition n&x = n ? Where x is a Any constant Positive Integer.

Note by Rishabh Deep Singh
3 years, 5 months ago

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- 3 years, 5 months ago

By next number, do you mean keeping x fixed, you want to search for the next such n?

- 3 years, 5 months ago

I have edited the Problem a little bit.

- 3 years, 5 months ago

Well, for the bits where x has a 1, n can have anything, and for the places where x has a 0, n must have a 0 too. Does that answer your question?

- 3 years, 5 months ago

Can u write code for that ? to print all numbers Please?

- 3 years, 5 months ago

That's an interesting exercise. If you are stuck on this, I'd urge you to consider writing your code recursively. That might help. Or if you are not concerned about efficiency, you may loop over all the values and check if it satisfies the condition.

- 3 years, 5 months ago

Efficiency is More important, Can u help me with code?

- 3 years, 5 months ago

I Found a Blog about it on Codeforces as SOS Dynamic Programming @Agnishom Chattopadhyay

- 3 years, 4 months ago

That's cool. Send me the link.

- 3 years, 4 months ago

- 3 years, 4 months ago

Sir are you CSE IITKGP?

- 3 years, 2 months ago

I am a Mechanical Student At IIT Kharagpur.

- 3 years, 2 months ago

Okay! I am CSE at IIT Patna.

- 3 years, 2 months ago