package yukicoder;

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) {
		BufferedReader read = new BufferedReader(new InputStreamReader(System.in));
		try {
			int N = Integer.parseInt(read.readLine());
			if(N % 4 == 0){
				System.out.println(N);
				return;
			}
			int min = N - 100;
			while(min++ < N + 100){
				if(min % 4 == 0){
					break;
				}
			}

			System.out.println(min);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}