#include <stdio.h>

int main(void) {
	 int n;
    int data[20];
    int i = 0;

    scanf("%d", &n);

    while (n > 0)
    {
        data[i] = n % 2;
        n = n / 2;
        i++;
    }

    while (i > 0)
    {
        i--;
        printf("%d", data[i]);
    }

	return 0;
}