public class DirectorSyom {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int N = Integer.parseInt(br.readLine());
int titles = 666;
int count = 1;
while(count != N) {
titles++;
if(String.valueOf(titles).contains("666")) {
count++;
}
}
System.out.println(titles);
}
}