#include <bits/stdc++.h>
#define FOR(i,bg,ed) for(ll i=(bg);i<(ed);i++)
#define REP(i,n) FOR(i,0,n)
#define MOD 1000000007
#define int long long
using namespace std;
typedef long long ll;
typedef vector<vector<ll>> mat;
const int INF = 1e9;



signed main()
{
    int N;
    vector<int> ans;

    cin >> N;
    
    if (N == 0) {
        cout << 0 << endl;
        return 0;
    }
    
    while (N != 0) {
        ans.push_back(N % 7);
        N /= 7;
    }

    reverse(ans.begin(), ans.end());
    REP(i,ans.size()) {
        cout << ans[i];
    }
    cout << endl;
}