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Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

2493 correct solutions
1397 incorrect solutions

Last solution submitted on May 05, 2015

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1 player likes this solution

1 Comment

Dimitris Kaliakmanis
on 15 Oct 2013

How this solution is possible?

1 Comment

Kuifeng
on 31 Mar 2012

This solution can accept arrays of integers as x input

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David Young
on 9 Feb 2012

A good example of a solution that does well on Cody's size measure, but which I wouldn't use for serious purposes.

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