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

/**************************************************************
	Problem: 1288
	User: linyuhang
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/