import java.util.Scanner;
public class Main {
    public static void main(String args[]) {
        final int baseCount = 111;
        final int input = new Scanner(System.in).nextInt();
        int result;
        if (input % baseCount == 0) {
            result = input;
        } else {
            result = (input / baseCount + 1) * baseCount;
        }
        System.out.println(result);
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz