#include "bits/stdc++.h"

#define ALL(a) (a).begin(),(a).end()
#define SORT(c) sort((c).begin(),(c).end())
#define DESCSORT(c) sort(c.begin(), c.end(), greater<int>())

using namespace std;

using LL = long long int;
using LD = long double;

using pii = pair<int, int>;
using pll = pair<LL, LL>;
using pdd = pair<double, double>;
using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using vl = vector<LL>;
using vvl = vector<vl>;
using vvvl = vector<vvl>;
using vd = vector<double>;
using vvd = vector<vd>;
using vs = vector<string>;
using vb = vector<bool>;
using vvb = vector<vb>;

const int INF = (1 << 30) - 1;
const LL INF64 = ((LL)1 << 62) - 1;
const double PI = 3.1415926535897932384626433832795;

const int dy[] = { 0, 1, 0, -1 };
const int dx[] = { 1, 0, -1, 0 };

int gcd(int x, int y) { return y ? gcd(y, x % y) : x; }
LL gcd(LL x, LL y) { return y ? gcd(y, x % y) : x; }

template<typename TypeInt>
std::string solve(const TypeInt v, int base)
{
	static const char table[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	string ret;
	static numeric_limits<TypeInt> t;
	TypeInt n = v;
	if (t.is_signed) {
		if (v < 0) n *= -1;
	}

	while (n >= base) {
		ret += table[n%base];
		n /= base;
	}
	ret += table[n];
	if (t.is_signed) {
		if (v < 0 && base == 10) ret += '-';
	}
	std::reverse(ret.begin(), ret.end());

	return ret;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);

	int n;
	cin >> n;

	cout << solve(n, 7) << endl;
	return 0;
}