#define _USE_MATH_DEFINES

#include <iostream>		//cin, cout
#include <vector>		//vector
#include <algorithm>	//sort,min,max,count
#include <string>		//string,getline, to_string
#include <cstdlib>		//abs(int)
#include <utility>		//swap, pair
#include <deque>		//deque
#include <climits>		//INT_MAX
#include <bitset>		//bitset
#include <cmath>		//sqrt, ceil. M_PI, pow, sin
#include <ios>			//fixed
#include <iomanip>		//setprecision
#include <sstream>		//stringstream
#include <numeric>		//gcd, assumlate
#include <random>		//randam_device
#include <limits>		//numeric_limits

using namespace std;
constexpr long long int D_MOD = 1000000007;

inline long long int ConvertBase(int N, int K) {
	//受け取った10進数NをK進数に変換する

	long long int result = 0;
	long long int temp;
	int i = 0;

	while (N > 0) {
		temp = N % K;
		result += temp * pow(10, i);
		N = N / K;
		i++;
	}
	return result;
}

int main() {

	long long int N;
	cin >> N;

	long long int ans = ConvertBase(N, 7);

	cout << ans << endl;

	return 0;

}