#include <iostream>
#include <string>
#include <cmath>
using namespace std;
class Binary {
    bool data[32];
    int number;
public:
    Binary();
    Binary(int value);
    Binary(string s);
    void show() const;
    int to_int() const;
    void bin(int n);
    void string_to_bin(string s);
};
void Binary::string_to_bin(string s) {
    for (int i = 0; i < s.length(); i++) {
        if (s[i] == '1') {
            data[i] = 1;
        }
        else {
            data[i] = 0;
        }
    }
}
void Binary::bin(int n) {
    if (n >= 2) {
        bin(n / 2);
    }
    number++;
}
Binary::Binary() {
    number = 0;
    for (int i = 0; i < 32; i++) {
        data[i] = 0;
    }
}
Binary::Binary(int value) {
    number = 0;
    bin(value);
    for (int i = number - 1; i >= 0; i--) {
        data[i] = value % 2;
        value /= 2;
    }
}
Binary::Binary(string s) {
    number = s.length();
    string_to_bin(s);
}
void Binary::show() const {
    for (int i = 0; i < number; i++) {
        cout << data[i];
    }
}
int Binary::to_int() const {
    int a = 0;
    for (int i = number-1; i >= 0; i--) {
        a += data[i] * pow(2, i);
    }
    return a;
}
int main() {
    int n;
    cin >> n;
    Binary bin(n);
    bin.show();
    system("pause");
    return 0;
}