#include <stdio.h>
#include <stdlib.h>
#define Max 100
/* This source is for converting a decimal number into a binary number */

int main(int argc, char *argv[]) {
	long long int Deci_Number;
	int i = 0, Size;
	char Converted_Number[Max];

	scanf("%lld", &Deci_Number);
	while(1){
		Converted_Number[i] = Deci_Number % 2;
		Deci_Number /= 2;
		i ++;
		if(Deci_Number == 0) break;
	}
	Size = i;
	for(i = 0; i < Size; i ++) printf("%d", Converted_Number[Size - 1 - i]);
	return 0;
}