#include <stdio.h>

int main() {
    int a;
    int b[32];
    int c = 0;

    scanf("%d", &a);

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

    while (a > 0) {
        b[c] = a % 2;
        a = a / 2;
        c++;
    }

    for (int d = c - 1; d >= 0; d--) {
        printf("%d", b[d]);
    }

    printf("\n");
	return 0;
}