import std.stdio;
void main()
{
auto a = [0.5, -0.5, 1.5, 2.0];
auto b = [3.5, 5.5, 3.0, -1.0];
auto c = new double[4];
c[] = (a[] + b[] + 1.0) / 2.0;
writeln(c);
}
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