#include <stdio.h>

int main(void)
{
    int n;
    int bin[32];
    int i = 0;

    scanf("%d", &n);

    if (n == 0) {
        printf("0");
        return 0;
    }

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

    for (int j = i - 1; j >= 0; j--) {
        printf("%d", bin[j]);
    }

    return 0;
}