#include <bits/stdc++.h>
using namespace std;
int main(){
    long long k=0,n,a[1000000];
    cin>>n;
    while (n!=0)
    {
        a[k]=n%8;
        k++;
        n=n/8;
    }
    for (int i=k-1;i>=0;i--)
    {
        cout<<a[i];
    }
     
}
/**************************************************************
	Problem: 1288
	User: fzy001
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:9764 kb
****************************************************************/