#include<bits/stdc++.h>
using namespace std;
int main(){
	long long n,x[1000],k=0;
	cin>>n;
	if(n!=0){
		while(n!=0){
			x[k]=n%8;
			n/=8;
			k++;
		} 
		for(int i=k-1;i>=0;i--){
			cout<<x[i];
		}
	} 
	else{
		cout<<"0";
	}
	return 0;
}
/**************************************************************
	Problem: 1288
	User: houshanglin
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/