#include <bits/stdc++.h>
#define LL long long
using namespace std;
const int N = 1e5 + 10;
const int INF = 0x3f3f3f3f;
int n;
void f (int n)
{
	if (n == 0) return;
	f (n / 8);
       cout << n % 8;
}
int main()
{
	    cin >> n;
	    f (n);
	    return 0;
}