//test1.cpp
#include"Stack.h"
#include<iostream>
using namespace std;

string getBinary(int i) {
    stack s;
    initStack(s);
    while (i != 0) {
        push(s, i % 2);
        i /= 2;
    }
    string str = "";
    while (!isEmpty(s)) {
        str += pop(s) + '0';
    }
    return str;
}

int main() {
    int decimal;
    cin >> decimal;
    cout << getBinary(decimal) << endl;;
    return 0;
}