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Consider equations having the following form:a*x1^2+b*x2^2+c*x3^2+d*x4^2=0a, b, c, d are integers from the interval [-50,50] and any of them cannot be 0.It is consider a solution a system ( x1,x2,x...

The SUM problem can be formulated as follows: given four lists A, B, C, D of integer values, compute how many quadruplet (a, b, c, d ) ∈ A x B x C x D are such that a + b + c + d = 0 . In the followin...

Given S, a set of integers, find the largest d such that a + b + c = d where a, b, c, and d are distinct elements of S.InputSeveral S, each consisting of a line containing an integer 1 <= n &lt...