import java.util.*;

public class Main {
    static final int MAX = 26;
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[][] comb = new int[MAX][MAX];
        int max = 0;
        for (int i = 0; i < MAX; i++) {
            for (int j = 0; j <= i; j++) {
                if (j == 0 || i == j) {
                    comb[i][j] = 1;
                } else {
                    comb[i][j] = comb[i - 1][j - 1] + comb[i - 1][j];
                }
                
            }
        }
        int[] counts = new int[MAX];
        for (int i = 2; i < MAX; i++) {
            for (int j = 2; j <= i; j += 3) {
                counts[i] += comb[i][j];
            }
        }
        int idx = 0;
        for (int i = 2; i < MAX; i++) {
            if (n > counts[i]) {
                n -= counts[i];
            } else {
                idx = i;
                break;
            }
        }
        for (int i = 0; i < (1 << idx); i++) {
            if (getCount(i) % 3 == 2) {
                n--;
            }
            if (n == 0) {
                System.out.println(getNum(i, idx));
                return;
            }
        }
    }
    
    static String getNum(int x, int length) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < length; i++) {
            if (x % 2 == 0) {
                sb.append("3");
            } else {
                sb.append("5");
            }
            x /= 2;
        }
        return sb.reverse() + "5";
    }
    
    static int getCount(int x) {
        int count = 0;
        while (x > 0) {
            count += x % 2;
            x /= 2;
        }
        return count;
    }
}