## Twitter Interview Question for Software Engineer Interns

Country: United States

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of 0 vote

I think that the answer is n/2 + 1.

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of 0 vote

The Solution is - total number of prime numbers less than n + 1

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0
of 2 vote

The question asks for minimum size of K, at which it becomes "impossible" to choose a team.

Consider n to be 10. Prime numbers are 2, 3, 5, 7. Which is 4. But we can choose a team with 5 players, which is stable. 5, 6, 7, 8, 9.

The answer is n/2 + 1.

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of 0 vote

exactly

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of 0 vote

Thanks @xeq for correcting me. I agree with your answer.

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xeq@
Looks like it breaks for n=25.
Your answer K = n/2+1 is 13 but it is possible to form a team of size 13 which does not fight -
8, 9, 10, 11,12, 13, 14, 15, 17, 19, 21, 23, 25

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of 0 vote

if(n%2==1) return (n-1)/2+1;
return (n/2)+1;

Reason-

We can have the numbers in following way-
1,3,5,7,9,11,... i.e all odd numbers- because if you divide odd by odd you still get back odd number. So, we just eliminated all even numbers and we can get even dividend only if we have even numbers

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``````if(n%2==1) return (n+1)/2+1;
return (n/2)+1;``````

Just replaced - sign by + when n id odd

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0
of 0 vote

``````if(n%2==1) return (n+1)/2+1;
return (n/2)+1;``````

Just replaced - sign by + when n id odd

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0
of 0 vote

why are considering odd case ? its given in question that n is guaranteed to be an even number

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