#include <iostream>
#include <algorithm>
#include <functional>
#include <string>
#include <climits>
#include <vector>
#include <numeric>
#include <complex>
#include <map>
#include <bitset>
#include <stack>
#include <queue>
#include <set>
using namespace std;

//#define __int64 long long
#define REP(i,a,b) for(int i=a;i<b;i++)
#define rep(i,n) REP(i,0,n)
const int Vec = 4;
const int Vecy[Vec] = {0,-1,0,1};
const int Vecx[Vec] = {1,0,-1,0};
const int Modd = 1000000007;

int main(){
	int n;
	long long ans = 0;
	int i = 0;
	
	cin >> n;
	
	while(n > 0){
		ans += (n % 7) * pow(10, i);
		n /= 7;
		i ++;
	}
	
	cout << ans << endl;
	
    return 0;
}