#include <iostream>
std::string ToBinary(unsigned long long int num)
{
    std::string bin="";
    while(num>0)
    {
        bin+=(char)(num%2+48);
        num/=2;
    }
    return bin;
}
int main()
{
    unsigned long long int number;
    std::string bin;
    while(std::cin>>number)
    {
        unsigned long long int num2=0;
        bin=ToBinary(number);
        for(int j=1,i=bin.length()-1;i>=0;--i,j*=2)
            num2+=(int)bin[i]%48*j;
        std::cout<<num2<<std::endl;
    }
    return 0;
}
 

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