Doubled Pairs

# Doubled Pairs drill

function main(x::Array{Int64, 1})::Bool # It's unnecessary to set the input & output types, but Rust is wearing off on me!
    s = Set(x);
    flag = false;

    for element in s
        element2 = 2element;

        if element2 in s
            println((element, element2));
            flag = true;
        end
    end

    flag
end