#include <cstdio>
#include<cstring>
using namespace std;
int a[1001],l;
int n;
void change(int x) {
   if(x/8>0)
   change(x/8);
   printf("%d",x%8);
}

int main() {
	freopen("change.in","r",stdin); freopen("change.out","w",stdout);
    scanf("%d",&n);
    change(n);
    return 0;
}