#include <stdio.h>

void exchange(int x, int b[], int *size) {
    int i = 0;

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

    *size = i;
}

int main() {
    int x, size, b[50], i;
    scanf("%d", &x);

    exchange(x, b, &size);

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

    return 0;
}