#include<bits/stdc++.h>
using namespace std;
int a[10000],b[10000],n,m=0,i=0;
int main(){
	cin>>n;
	while(n>0){
		a[i]=n%8;
		n/=8;
		i++;
	}
	for(int j=i;j>=0;j--1){
		m=m*10+a[j];
	}
	cout<<m;
}
/**************************************************************
	Problem: 1288
	User: zhengzihao
	Language: C++
	Result: Compile Error
****************************************************************/