#include <stdio.h>
int main()
{
   char s[1000], r[1000];
   int begin, end, count = 0;
   printf("Input a string:");
   gets(s);
   while (s[count] != '\0'){
      count++;

   }
        // Calculating string length
   end = count - 1;
   for (begin = 0; begin < count; begin++) {
      r[begin] = s[end];
      end--;
   }


   r[begin] = '\0';


   printf("%s\n", r);


   return 0;
}