=(a 1+a2+...+a95)^2-(a 1^2+a2^2+...+a95^2)
=(a 1+a2+...+a95)^2-95
In order to get the smallest positive number, in the above formula, (a 1+A2+...+A95) =11,(10 can't be obtained, because the sum of odd numbers-1,1won't.
So the minimum value is (121-95)/2 =13.
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