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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAXLEN 1000
/* Reverses string in place using recursion */
void reverse(char[], int, int);
int main(int argc, char *argv[]) {
char *s;
size_t n;
s = malloc(sizeof(char) * MAXLEN);
fgets(s, MAXLEN, stdin);
reverse(s, 0, strlen(s) - 2);
printf("\t%s\n", s);
free(s);
return 0;
}
void reverse(char s[], int i, int j) {
if (i < j) {
reverse(s, i + 1, j - 1);
s[i] = s[i] ^ s[j];
s[j] = s[i] ^ s[j];
s[i] = s[i] ^ s[j];
}
}
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