#include <stdio.h>
#include <stdlib.h>

int main(int argc, char const *argv[])
{
	int stack[10000]={0};
	int top=-1;
	int num;
	scanf("%d",&num);
	while(num){
	stack[++top]=num%2;//余数入栈
	num/=2;//整数自除
	}
	while(top!=-1){
		printf("%d",stack[top--]);
	}
	return 0;
}