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


/**************************************************************
	Problem: 1288
	User: zhuangsongyu
	Language: C++
	Result: Wrong Answer
****************************************************************/