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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.

2780 correct solutions
1621 incorrect solutions

Last solution submitted on Aug 28, 2015

6 players like this problem

1 Comment

Dan W
on 10 Jul 2015

Ha!

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

2 players like this solution

1 Comment

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.

3 Comments