#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;
        n==n;
        if(n==n){
        	cin>>n;
        }
    }
    for(int i=k-1;i>=0;i--){
        cout<<a[i];
    }
}
/**************************************************************
	Problem: 1288
	User: wangyichen2
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/