#define _USE_MATH_DEFINES
#include <algorithm>
#include <cstdio>
#include <functional>
#include <iostream>
#include <cfloat>
#include <climits>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <time.h>
#include <vector>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<ll, int> ll_i;
typedef pair<double, int> d_i;
typedef pair<ll, ll> ll_ll;
typedef pair<double, double> d_d;
struct edge { int u, v; ll w; };

ll MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-10;

int main() {
	int N; cin >> N;
	vector<bool> a;
	while (N--)
		for (;;) {
			int i;
			for (i = 0; i < a.size() && a[i]; i++);
			if (i == a.size()) a = vector<bool>(a.size() + 1);
			else {
				a[i] = true;
				for (int j = 0; j < i; j++)
					a[j] = false;
			}
			int cnt = 1;
			for (int i = 0; i < a.size(); i++)
				cnt += a[i];
			if (cnt % 3 == 0) break;
		}
	for (int i = a.size() - 1; i >= 0; i--)
		cout << (a[i] ? '5' : '3');
	cout << '5' << endl;
}