#include <iostream>
using namespace std;
int main()
{
    int n;
    cin>>n;
    cout<<n+n/100+n/10%10*10+n%10*100<<endl;
}

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n,x=0,a=0;
    cin>>n;
    x+=n/100+n/10%10*10+n%10*100;
    a+=n+x;
    cout<<a;
	return 0;
}

C :

#include<stdio.h>
int main()
{
	int a;
	scanf("%d",&a);
	int b=a/100%10;
	int c=a/10%10;
	int d=a/1%10;
	printf("%d\n",d*100+c*10+b+a);
		
	return 0;
}

C++ :

#include <iostream>
#include <iomanip>
using namespace std;

int main(){
    int n;
    cin>>n;
    cout<<n+n/100+n/10%10*10+n%10*100<<endl;
}

Python :

r = int(input())
a = r // 100;
b = r // 10 % 10
c = r % 10;
print(c * 100 + b * 10 + a + r)