#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,k=0,a[10000];
    cin>>n;
    if(n==0) cout<<0;
    while(n!=0){
    	a[k++]=n%8;
    	n/=8;
	}
	for(int i=k-1;i>=0;i--) cout<<a[i]; 
    return 0;
}
/**************************************************************
	Problem: 1288
	User: panyuchen
	Language: C++
	Result: Wrong Answer
****************************************************************/