#include <iostream>
#include <stack>
using namespace std;
int main()
{
    int num;
    cin >> num;
    stack<int> s;
    while (num)
    {
        s.push(num % 8);
        num /= 8;
    }
    if (s.empty())
    {
        cout << 0;
    }
    while (!s.empty())
    {
        cout << s.top();
        s.pop();
    }
    return 0;
}