#include <iostream>
using namespace std;
void D2B(int x);
int main()
{
        int x;
        while(1)
        {
                cin >> x;
                D2B(x);
                cout << endl;
        }
    return 0;
}
void D2B(int x) //Decimal to binary
{
        char B[50];
        itoa(x,B,2); // every x, in array b , to base 2
        cout << B;
}