#include <bits/stdc++.h>
#define GET_MACRO(a, b, c, NAME, ...) NAME
#define rep(...) GET_MACRO(__VA_ARGS__, rep3, rep2)(__VA_ARGS__)
#define rep2(i, a) rep3 (i, 0, a)
#define rep3(i, a, b) for (int i = (a); i < (b); i++)
#define repr(...) GET_MACRO(__VA_ARGS__, repr3, repr2)(__VA_ARGS__)
#define repr2(i, a) repr3 (i, 0, a)
#define repr3(i, a, b) for (int i = (b) - 1; i >= (a); i--)
#define chmin(a, b) ((b) < a && (a = (b), true))
#define chmax(a, b) (a < (b) && (a = (b), true))
using namespace std;
typedef long long ll;

int main() {
	int N;
	cin >> N;
	int cnt = 0;
	rep (i, 1, 26) {
		rep (j, 1 << i) {
			if (__builtin_popcount(j) % 3 == 2) {
				cnt++;
				if (cnt == N) {
					string ans;
					rep (k, i) {
						if (j % 2 == 0) {
							ans = "3" + ans;
						} else {
							ans = "5" + ans;
						}
						j /= 2;
					}
					ans = ans + "5";
					cout << ans << endl;
					return 0;
				}
			}
		}	
	}
    return 0;
}