#include<stdio.h>
#include<conio.h>

void rev(int);

void main()
{
 int n;
 clrscr();
 printf("\n ENTER HOW MANY CHARACTERS");
 scanf("%d",&n);
 fflush(stdin);
 printf("\nEnter your string: ");
 rev(n);
 getch();
}


void rev(int n)
{
 char c;
 if(n==1)
 {
  c=getchar();
  putchar(c);
 }
 else
 {
  c=getchar();
  rev(n-1);
  putchar(c);
 }
}