C :

#include <stdio.h>
	int main ()
{
	int n,m=1,sum=0;
	int i,j=0,k=0;
	int a[3]; 
	scanf ("%d",&n);
	
	for (i=0;i<3;i++)
	{
		a[i]=n%10;
		n/=10;
	}	
	
		for (i=0;i<3;i++)
	{	
		sum*=10;	
		sum+=a[i];
	}
		for (i=2;i>=0;i--)
	{
		sum*=10;
		sum+=a[i];
			
	}
	printf ("%d",sum);
	return 0;
}

C++ :

#include <iostream>
using namespace std;
int main(){
	int x;
	cin>>x;
	int bw,sw,gw;
	bw=x/100;
	sw=x/10%10;
	gw=x%10;
	cout<<gw*100000+sw*10000+bw*1000+bw*100+sw*10+gw;
	return 0;
}

Java :

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int g = n % 10;
		int s = n / 10 % 10;
		int b = n / 100;
		int sum = n + g * 100000 + s * 10000 + b * 1000;
		System.out.println(sum);
	}
}

Python :

a=int(input())
b=a//100
c=a//10%10
d=a%10
print(d,c,b,b,c,d,sep='')