import java.util.Scanner;
public class Main {
public static boolean judge(int n){
int t=0;
while(n>0)
{ t=n%16;
if(t<10)
return false;
n/=16;}
return true;
}
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
for(int i=2023;;i++){
if(judge(i))
{ System.out.println(i);
break;
}
}
scan.close();
}
}