#include <bits/stdc++.h>
#define REP(i,n,N) for(int i=(n);i<(int) N;i++)
#define p(s) cout<<(s)<<endl
typedef long long ll;
using namespace std;

int main(){
	ll N;
	cin>>N;
	ll waru=7;
	ll ans=0;
	ll keta=1;
	while(N>0){
		ans+=N%waru*keta;
		N/=waru;
		keta*=10;
	}
	p(ans);
	return 0;
}