#include<bits/stdc++.h>
using namespace std;
int main()
{
	long long n;
	cin>>n;
	int a[100],k=0;
	if(n==0){
		cout<<0;
		return 0; 
	}
	while(n!=0){
		a[k++]=n%8;
		n=n/8;
	}
	for(int i=k-1;i>=0;i--){
		cout<<a[i];
		
	}
}

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