import java.io.*;
import java.util.*;
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int n = Integer.parseInt(br.readLine());
int title = 666;
int cnt = 1;
while(cnt != n) {
title++;
String s = Integer.toString(title);
if(s.contains("666")) cnt++;
}
System.out.println(title);
}
}
2023-03-23