My maze generator at http://tromp.github.io/pearls.html#maze http://tromp.github.io/pearls.html#maze produces arbitrarily long proper mazes on the fly. After c

My maze generator at http://tromp.github.io/pearls.html#maze http://tromp.github.io/pearls.html#maze produces arbitrarily long proper mazes on the fly. After compiling and running, enter -1 as the requested height.