#include<iostream>
#include<cstdio>
#include<cmath>
#include<algorithm> 
#include<string>
#include<cstring>
using namespace std;
int main()
{
    int n;
    int a[100] = { 0 };
    while (cin >> n) {
        int cnt = 0;
        if (n == 0) {
            cout << 0;
            continue;
        }
        while(n !=0){
            a[cnt] = n % 8;
            n = n / 8;
            cnt++;
            if (n == 0)break;
        }
        for (int i = cnt - 1; i >= 0; i--) {
            cout << a[i];
        }
        cout << endl;
    }
    return 0;
}