#include<bits/stdc++.h>
using namespace std;
int main(){
	long long s;
	long long n[10000],k = 0;
	cin >> s;
	if(s == 0) cout<< 0;
	else
	{
		while(s != 0)
	    {
		     n[k++]= s % 8;
		     s /= 8;
		
	    }
	    for( int i = k - 1; i >= 0; i--)
	    {
		    cout << n[i];
	    }
    }
	return 0;
	
}

/**************************************************************
	Problem: 1288
	User: yangwanning
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/