#include <stdio.h>
#include <string.h>

void invert_str(char *str,int n);

int main(void){
	char str[1000];
	int n = 0;

	printf("Input string->");
	gets(str);
	
	n = strlen(str);

	invert_str(str, n);
	

	return 0;
}


void invert_str(char *str,int n){
	char *ans;
	int i,j;

	ans = (char*)calloc(n + 1, sizeof(char));
	ans[n] = '\0';

	for (i = n - 1, j = 0; i > -1; i--,j++){
		ans[i] = str[j];
		//printf("%c", str[i]);
	}
	printf("Inverted string->%s\n", ans);
	free(ans);
}