#include<iostream>
using namespace std;
bool b[30];
int main(){
    ios::sync_with_stdio(false);
    int n, i = 1;
    cin >> n;
    while(n != 0){
        b[i] = (n & 1);
        n = (n >> 1);
        i++;
    }
    while(--i)cout << b[i];
    return 0;
}

#include <iostream>
#include <string>

std::string decimalToBinary(int n) {
std::string binary = "";
if (n == 0) {
return "0";
}
while (n > 0) {
binary = (n % 2 == 0 ? "0" : "1") + binary;
n = n / 2;
}
return binary;
}

int main() {
int number;
std::cin>>number; // 示例数字
std::string binary = decimalToBinary(number);
std::cout<< binary << std::endl;
return 0;
}