import java.util.*;

public class Main {
	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int count = 0;
		int x = 0;
		int length = 1;
		while (count < n) {
		    x = 0;
		    while (count < n && x < (1 << length) - 1) {
		        x++;
    		    if (isSuper(x)) {
    		        count++;
    		    }
		    }
		    length++;
		}
		StringBuilder sb = new StringBuilder();
		for (int i = 0; i < length - 1; i++) {
		    if ((x & 1L) == 0) {
		        sb.append("3");
		    } else {
		        sb.append("5");
		    }
		    x >>= 1;
		}
		sb.reverse();
		System.out.println(sb + "5");
	}
	
	static boolean isSuper(long x) {
	    long count = 0;
	    while (x > 0) {
	        count += (x & 1L);
	        x >>= 1;
	    }
	    return (count % 3 == 2);
	}
}