#include<fstream.h>

ifstream f("date.in");
ofstream g("date.out");

struct nod {int info;
	    nod *leg;
	   };
	nod *prim;

void adaugs(nod *&prim,int x)
 {if(prim)
  {nod *u=prim;
   while(u->leg) u=u->leg;
   nod *nou=new nod;
   nou->info=x;
   nou->leg=0;
   u->leg=nou;
  }
      else {prim=new nod;
	    prim->info=x;
	    prim->leg=0;
	   }
}
void creare()
 {int x;
 while(f>>x) adaugs(prim,x);
 }

void afis(nod *prim)
 {nod *p;
  p=prim;
  while(p)
   {g<<p->info<<" ";
    p=p->leg;
   }
 g<<endl;
}

void invers(nod *&prim)
 {nod *r,*p,*q;
  r=prim;
  p=prim->leg;
  q=prim->leg->leg;
  while(q) {p->leg-r;
	    r=p;
	    p=q;
	    q=q->leg;
	   }
  prim=p;
 }

void main()
 {creare();
  afis(prim);
  invers(prim);
  afis(prim);
 }