name = 'mirrorBT/2' slug = 'flip a binary tree horizontally' description = '''\ <p><code>mirrorBT(T, NewT)</code>: the binary tree <code>NewT</code> is obtained from <code>T</code> by flipping it over the vertical axis through the root node.</p> <pre> ?- mirrorBT(b(b(b(nil,4,nil),2,b(nil,5,nil)),1,b(nil,3,nil)), X). X = b(b(nil,3,nil), 1, b(b(nil,5,nil), 2, b(nil,4,nil))). </pre>''' hint = {}