Created
December 9, 2014 10:38
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Codility-Lesson 2-Challenge 1
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| def solution(a) | |
| len=a.length | |
| sum=a.inject(:+) | |
| if sum==(((a.length)*(a.length+1))/2) && (a.uniq.length==len) | |
| 1 | |
| else | |
| 0 | |
| end | |
| end |
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