#include <iostream> #include <cstdio> #include <cstring> #include <string> #include <stack> #include <queue> #include <functional> #include <algorithm> #include <map> #include <unordered_map> #include <set> #include <unordered_set> #include <vector> #include <array> #include <tuple> #include <utility> #include <numeric> #include <iomanip> #include <cctype> #include <cmath> #include <assert.h> #include <cstdlib> #include <list> using namespace std; using ll = long long; using ull = unsigned long long; using PII = pair<int, int>; using PLL = pair<ll, ll>; template<typename T1, typename T2> ostream& operator<<(ostream& s, const pair<T1, T2>& p) { return s << "(" << p.first << ", " << p.second << ")"; } template<typename T> ostream& operator<<(ostream& s, const vector<T>& v) { s << "["; for (int i = 0; i < v.size(); i++) s << (i == 0 ? "" : ", ") << v[i]; s << "]"; return s; } #define ALL(a) (a).begin(), (a).end() void out(ll n) { if (n <= 6) { cout << n; } else { out(n / 7); cout << n % 7; } } int main() { ll n; cin >> n; out(n); cout << endl; return 0; }