#include<bits/stdc++.h>
using namespace std;
int main(){
   long long n,x;
   string s;
   char c;
   cin>>n;
   while(n!=0){
   	x=n%8;
   	c=x+'0';
   	s=c+s;
   	n=n/8;
   }
    cout<<s;
    return 0;
}

/**************************************************************
	Problem: 1288
	User: zhangailin
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/