#include<iostream>
using namespace std;
int main()
{
 	int num,b=1;
 	cin>>num;
 	if(num==0)
 	cout<<num;
	while(1)
	{ 
  		if(num>=b)
 	{
  		b*=8;
   		continue;   
 	}
  		b/=8;
  		if(b==0)
  		break;    
  		cout<<num/b;
  		if(num>=b)
  			num%=b;
	}
}

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