import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        long s = 998244353;
        long temp = s;
        long input = scanner.nextLong();
        if (input >= 0 && input < s) {
            System.out.println(input);
        } else if (input < 0 && input > -s) {
            System.out.println(s + input);
        } else if (input <= -s) {
            while (temp >= input) {
                if (input - temp > s) {
                    break;
                }
                temp -= s;
            }

            System.out.println(input - temp);
        } else {
            while (temp <= input) {
                if (input - temp < s) {
                    break;
                }
                temp += s;
            }
            System.out.println(input - temp);
        }
    }
}