#include <stdio.h>

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

scanf("%d", &n);

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

while (n > 0) {
a[i] = n % 2;
n = n / 2;
i=i+1;
}
for (int j = i - 1; j >= 0; j--) {
printf("%d", a[j]);
}
return 0;
}