/*
 * @(#)$Id: div3,v 1.1 1994/09/16 09:38:16 dream Exp $
 *
 * $Log: div3,v $
 * Revision 1.1  1994/09/16 09:38:16  dream
 * Initial revision
 *
 */

problem([]==>x:pnat=>y:pnat=>(y=0 in pnat=> void)=>
                                   div(plus(y,x),y)=s(div(x,y)) in pnat,_,_,_).