#include<bits/stdc++.h>
using namespace std;
int main(){
int a[200]={0},s=0;
long n;
cin>>n;
if(n==0) cout<<0;
while(n>0){
    a[s++]=n%8;
    n=n/8;
}
for(int i=s-1;i>=0;i--){
    cout<<a[i];
}
    return 0;
}
/**************************************************************
	Problem: 1108
	User: chenyaohuo
	Language: C++
	Result: Wrong Answer
****************************************************************/