import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long[][] nCk = new long[26][26];
		nCk[0][0] = 1;
		for (int i = 1; i <= 25; ++i) {
			for (int j = 0; j <= i; ++j) {
				nCk[i][j] = (j > 0 ? nCk[i - 1][j - 1] : 0) + (i - 1 >= j ? nCk[i - 1][j] : 0);
			}
		}
		long[] count = new long[26];// count[i]:i桁の時の組み合わせの数
		for (int i = 1; i < count.length; ++i) {
			count[i] = count[i - 1];
			for (int j = 3; j <= i; j += 3) {
				count[i] += nCk[i - 1][j - 1];
			}
		}
		int N = sc.nextInt();
		int digit = 0;
		while (count[digit] < N)
			++digit;
		long cnt = N - count[digit - 1];
		for (int i = 1; i < (1 << digit); i += 2) {
			int c5 = Integer.bitCount(i);
			if (c5 % 3 == 0) {
				--cnt;
			}
			if (cnt == 0) {
				for (int j = digit - 1; j >= 0; --j) {
					if (((1 << j) & i) > 0) {
						System.out.print(5);
					} else {
						System.out.print(3);
					}
				}
				System.out.println();
				return;
			}
		}
		tr(count[digit]);

		tr(count);
	}

	static void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}
}