#include <stdio.h>
#define MAXLINE 1000

void reverse(char line[], int length);
int getline(char line[], int max);
void copy(char from[], char to[]);

int main()
{
    char line[MAXLINE];
    int len;
    while ((len = getline(line, MAXLINE)))
    {
        reverse(line, len);
        printf("%s", line);
    }
    printf("\n");
    return 0;
}

/* reverse:  reverses the given line
             of given length
   Returns: Nothing                  */
void reverse(char s[], int len)
{
    int i;
    --len; /* forget the silly \0 */
    char temp[len];
    copy(s, temp);   /* Copy the current line to a temporary space */
    for(i = len; i >= 0; --i)
        s[i] = temp[len - i];
    /*  printf("%s %s", s, temp); */
    return;
}

/* getline:  gets the current line
   Returns: length of the line, limited to MAXLINE */

int getline(char s[], int max)
{
    int c, i;
    for(i = 0; (i != max - 1) && (c = getchar()) != EOF && (c != '\n'); ++i)
        s[i] = c;
    if (c == '\n')
    {
        s[i] = c;
        ++i;
    }
    s[i] = '\0';
    return i;
}

/* copy:  copys "from" to "to" assuming
          "to" is large enough
   Returns: nothing                      */

void copy(char from[], char to[])
{
    int i;
    for(i = 0; (to[i] = from[i]) != '\0'; ++i);
}