/*输入123,输出321*/

#include<stdio.h>
#define L sizeof(number)
typedef struct number
{
     int num;
     struct number *next;
}number;
number* integerlist(int d)
{
     number *last,*p,*head;
     int n;
      n=d;
     head=NULL;
     do
     {
         p=(number*)malloc(L);
         p->next=NULL;
         if(head==NULL)
         {
             head=p;
             last=p;
         }
         p->num=n%10;
         last->next=p;
         last=p;
         n=n/10;
     }while(n!=0);
     return head;
}
int main()
{    
     int d;
     number *p;
     scanf("%d",&d);
     p=integerlist(d);
     while(p!=NULL)
     {
         printf("%d",p->num);
         p=p->next;
     }
     printf("\n");
}