[백준] 1436번 영화감독 숌

import java.util.Scanner;

public class Main {
	

	public static void main(String[] args) {
		
		Scanner kb = new Scanner(System.in);
		
		int n = kb.nextInt();
		int count = 1;
		int find = 666;
		
		while(true) {
			if(count == n) {
				System.out.println(find);
				break;
			}
			
			find++;
			
			if(String.valueOf(find).contains("666")) {
				count++;
			}
		}

	}

}