#include<stdio.h>

int main(){
	int a,b,pos;
	while(scanf("%d",&a)!=EOF){
		pos=1,b=0;
		while(a!=0){
			if(a%2==1)
				b+=pos;
			pos*=10;
			a/=2;
		}
		printf("%d\n",b);
	}
	return 0;
}