#include<iostream>

#define MOD 1000000007

using namespace std;

int main(){

	int N;
	int M=1;

	cin>>N;

	while(M*7<=N){
		M*=7;
	}

	while(M!=0){
		cout<<N/M;
		N%=M;
		M/=7;
	}

	cout<<endl;


}