#include<stdio.h>

void print7(long a){
	if(a<7) printf("%ld",a);
	else{
		print7(a/7);
		printf("%ld",a%7);
	}
}

int main(int argc, char const *argv[]){
	long n;
	scanf("%ld",&n);
	print7(n);
	printf("\n");
	return 0;
}