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Sample IO

Posted by hadi at 2007-12-15 18:32:40 on Problem 3471 
Hi!
 Could you please explain the sample input?
 the first one is (x-1)*(x+1)*(x+1), so the roots are -1,-1,1 : So why -1,1?
 the second one is (x+1)*(x+1), so the roots are -1,-1: Why in this case we should output -1 twice but in the previous one only once?
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