#include<bits/stdc++.h>
using namespace std;
int k,a[1000]; 
long long n;
int main(){
	cin>>n;
	if(n==0){
		cout<<0;
	}
	while(n!=0){
		a[k]=n%8;
		n=n/8;
		k++;
	}
	for(int i=k-1;i>=0;i--){
		cout<<a[i];
	}
	return 0;
}

/**************************************************************
	Problem: 1288
	User: zengyixuan
	Language: C++
	Result: Accepted
	Time:15 ms
	Memory:2076 kb
****************************************************************/