//
//  main.cpp
//  Test
//
//  Created by Andrey Zozulych on 20.07.2020.
//  Copyright © 2020 Andrey Zozulych. All rights reserved.
//

#include <iostream>

int main() {
    // insert code here...
    int num;
    std::cin>>num;
    int firstDigit=num/100;
    num-=firstDigit*100;
    int secondDigit=num/10;
    num-=secondDigit*10;
    num*=10;
    num+=secondDigit;
    num*=10;
    num+=firstDigit;
    std::cout<<num;
}