/*Ejercicio 1-19 (The C programming language)*/
#include <stdio.h>
#define MAXLINE 1000

int getline(char line[], int maxline);
void reverse(char s[]);
void copy(char to[], char from[]);

main()
{
	int len;
	int i;
	char line[MAXLINE];

	i = 0;
	while ((len = getline(line, MAXLINE)) > 0){
		reverse(line);
		printf("%s", line);
	}
	return 0;
}
void reverse(char s[])
{
	int i, j;
	char revertido[MAXLINE];
	for (i = (strlen(s) - 2), j = 0; i >= 0; --i, ++j)
		revertido[j] = s[i];
	revertido[j] = '\n';
	revertido[j+1] = '\0';
	copy(s, revertido);
}
int getline(char s[], int lim)
{
	int c, i;

	for (i=0; i<lim-1 && (c =getchar())!=EOF && c !='\n'; ++i)
		s[i] = c;
	if(c == '\n'){
		s[i] = c;
		++i;
	}
	s[i] = '\0';
	return i;
}
void copy(char to[], char from[])
{
	int i;

	i = 0;
	while ((to[i] = from[i]) != '\0')
		++i;
}