#include <bits/stdc++.h>
using namespace std;
int main(){
    long long k=0,n,a[1000000];
    cin>>n;
    while (n!=0)
    {
    	a[k]=n%8;
    	k++;
    	n=n/8;
	}
	for (int i=k-1;i>=0;i--)
	{
		cout<<a[i];
	}
    
}
 

/**************************************************************
	Problem: 1288
	User: admin
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:9760 kb
****************************************************************/