C :

#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
    int a;
	scanf("%d",&a);
	printf("%d",a%10*10000+(a%100-a%10)*100+a%1000-a%100+(a%10000-a%1000)/100+(a-a%10000)/10000);
	return 0;
}

C++ :

#include <iostream>
#include <cstdio>
using namespace std;
int main()
{
	int n;
	cin>>n;
	do
	{
		cout<<n%10;
		n=n/10;
	}while(n!=0);
	return 0;
}