#include <iostream>
#include <string>

int main(int argc, char* argv[]){
    int n;
    std::cin >> n;
    if(n == 0){
        std::cout << 0 << std::endl;
    }
    std::string s;
    while(n != 0){
        s.push_back(n % 10 + '0');
        n /= 10;
    }
    std::cout << s << std::endl;
    return 0;
}