#include <iostream>


int main() {
    int n;
    
    std::cout<<" enter a number : "<<std::endl;
    std::cin>>n;
    
    int x;
    x = 0;
    int y;
    
    while ( n>0){
        
        y = n%10;
        
        x = x *10;

        x = x + y;
        
        n = n/10;

    }
    std::cout<<x;
     return 0;   
}