import java.util.Scanner;


public class Main_yukicoder294 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        int cnt = 0;
        out:
        for (int i = 3; i < 26; i++) {
        	for (int k = 1; k < 0x1 << i; k += 2) {
        		int tmp = Integer.bitCount(k) * 5 + (i - Integer.bitCount(k)) * 3;

        		if (tmp % 3 == 0) {
        			cnt++;
        			if (cnt == n) {
        				String btmp = "";
                		for (int l = i - 1; l >= 0; l--) {
                			if ((k & 0x1 << l) == 0) {
                				btmp += "3";
                			} else {
                				btmp += "5";
                			}
                		}
        				System.out.println(btmp.toString());
        				break out;
        			}
        		}
        	}
        }

        sc.close();
    }
}