#include<stdio.h>
int main(void)
{
int n,tmp[1024*1024],*p;
p=tmp;
*p=0;
scanf("%d",&n);
while(n!=0){
*(p++)=n%7;
n/=7;
}
while(p!=tmp){
printf("%d",*(p--));
}
printf("%d¥n",*p);
return 0;
}