#include <iostream>
using namespace std;
using ll = long long;
int main() {
    ll a;
    cin>>a;
    ll b=a;
    ll c=0;
    while(b>0){
        c*=10;
        c+=b%10;
        b/=10;
    }
    cout<<a+c;
}
// 64 位输出请用 printf("%lld")